Bambu Lab P1S — Review
Published · Researched 2026-09-21
The P1S is the enclosed printer everyone actually buys. Not the flagship — that's a discontinued X1 Carbon with the P2S as its successor — but the one that quietly became the default recommendation for anyone who wants to print ABS without drama. Three years in, it's the rational buy in the Bambu lineup, and the only serious question is whether the P2S's $150 premium is worth it to you.
What it is: the same CoreXY motion platform and 500 mm/s speed ceiling as the old X1 Carbon, minus the lidar, the touchscreen, and the AI failure detection, wrapped in an enclosure with an activated-carbon filter. Launched mid-2023 as the enclosed sibling of the open P1P. Still current, still shipping, with Bambu guaranteeing firmware updates through July 2028.
What's genuinely good is the absence of friction. Owners call it an "utter workhorse" — flawless in PLA and PETG right out of the box, first-time buyers printing a perfect benchy within minutes, one YouTube unboxer changing literally zero settings. The enclosure is what makes it: ABS and ASA become genuinely practical at this price instead of a warping lottery, and the chamber fan plus carbon filter keep the fumes conversation reasonable — though note the filter is a carbon filter, not a HEPA, and it needs periodic replacement. Setup is a 15-minute affair. The platform is mature — three years old — so the spare-parts ecosystem is deep, which is more than you can say for most 2026 rivals. And at the current street price, you're getting 90% of the old flagship's printing experience for a fraction of its launch price.
The long-term owner signal, new from this research pass, is genuinely strong. A January 2026 comparison built on a 600-hour test plus surveys of Bambu user groups and forums collected 1+ year P1S owners' verdicts: "Unbeatable value. Paid for itself in three months." "Rock-solid reliability. Runs 12+ hours daily without issues." A Reddit aggregation from late 2025 lands in the same place — overwhelmingly positive, with the criticisms being constructive rather than angry: proprietary components, AMS quirks, privacy unease around the cloud, and open questions about long-term durability of high-stress parts, with limited concrete failure evidence. Hacker News owners cite "extremely small" failure rates. This is a machine with a three-year reliability record, not a launch-hype record.
What's actually wrong starts with the AMS, the same place it always does. Purge waste on color changes is brutal — one owner's 4-color octopus weighed 9 grams and purged 55.3 grams to get there. That's not a rounding error; budget for it. The AMS brings its own quirks: filament tangles, feed issues, and fussiness with unusual spools. The fans and the calibration routine are loud — a third-party comparison puts it around 72 dB, and owners describe the calibration as something you hear through doors. The 0.5-fps camera and the D-pad screen feel dated now that the P2S exists with a proper touchscreen and quieter operation.
Then the mid-life failure reports, which a three-year-old platform accumulates honestly. In September 2026 a forum owner at ~400 hours reported the heat bed groaning loudly on Z moves, the printer refusing to print, and calibration failing outright — the community's suspicion fell on a rod bearing or a shifted base unit. It's a single-owner report, but it's exactly the class of failure a prospective buyer should know exists: after the honeymoon, the motion system can need real debugging. Access for deep maintenance is also worse than on the open A1 — clearing a serious clog or servicing belts means working inside the box.
The firmware-update pattern deserves its own paragraph. Multiple official-forum threads document P1S units that ran reliably for months degrading after an update — clogs, AMS feed errors — with Bambu's standard fix being a factory reset, which works for some owners and not others. The community's hard-won rule: search the forum for the firmware version number before updating, and never update on release day. Treat Bambu firmware the way you'd treat a phone OS update on a device you depend on.
Then there's the part enthusiasts can't let go: closed firmware and the 2025 Authorization Control System, Bambu's cloud-gated firmware authentication, which drew a wave of 1-star Trustpilot reviews and broke third-party slicer workflows for a stretch. Support is the other sore spot — one forum user waited an eternity on a $500+ printer's ticket. To be fair, other owners report same-day engineer responses and machines so reliable they never needed support at all. The honest summary: the printer rarely needs help, but when it does, it's a lottery. Replacement parts carry Bambu's premium pricing versus open-source generics — owners cut costs by ordering spares from AliExpress. Two housekeeping flags: the official store page showed $579 without saying which variant that was — the street price is ~$399, verify live — and power-loss recovery is claimed by retailers but wasn't on the official spec excerpt verifiable in research.
The social pulse is oddly quiet for a bestseller. The big Facebook groups barely mention it — recent feeds are dominated by model-share spam, and no dedicated P1S owners group surfaced. The real conversation is on the forums: Overclockers UK owners praising the £479 combo, Bambu forum threads mixing love letters with support complaints, Hacker News owners citing tiny failure rates. YouTube is unboxings and owner showcases, all positive. Nobody's fighting about whether it prints well — they're fighting about whether Bambu the company deserves the money.
The value call is simple: ~$399 standalone or ~$499 for the Combo at B&H and Best Buy — down from $699/$999 at launch — makes this the best-value enclosed printer on the market. The only serious "don't buy" case is the P2S at roughly $150 more: touchscreen, 65 dB operation (7 dB quieter, measured), tool-free nozzle swaps, the DynaSense extruder that owners say kills the clicking and grinding under load, and AI detection that catches spaghetti failures. Reviewers who've run both say the P2S is better in every measurable way — but for a casual user printing a few projects a month on a well-tuned P1S, the upgrade won't feel dramatic. For power users and multi-material operators, the P2S is the right machine. If the $150 doesn't matter to you, pay it. If it does, the P1S is the rational buy, and the refurbished market is worth a look too.
The tradeoff, in the community's own terms: it prints like an appliance and answers to a cloud. If you can live with the second part, the first part is unbeatable at $399.
Sources
- us.store.bambulab.com — retrieval date not recorded