Who is the Bambu Lab P1S for?
The P1S is the right printer if you print, or want to print, more than just PLA models. The enclosed chamber holds a warm, stable environment that lets it handle ABS and other higher-temperature engineering filaments without the warping that ruins those prints on an open machine. It suits people making functional and mechanical parts, prototypes that need to survive heat or stress, and anyone who wants serious speed and multi-colour capability in a near plug-and-play package.
It is less suited to someone who only ever prints simple PLA models and wants to spend as little as possible. For that buyer the P1S is overkill: the Bambu Lab A1 gives a comparable finish on PLA for roughly half the price. The P1S is about capability and material range, not basic print quality, so you buy it for what it lets you do, not for prettier PLA.
How the Bambu Lab P1S performs
The enclosure and materials
The headline feature is the fully enclosed build chamber. It keeps the heat in, which is exactly what ABS, ASA and similar engineering filaments need to print without warping or cracking. It also contains noise and fumes better than an open machine. If you have ever tried and failed to print ABS on an open printer, the difference here is night and day, and it is the single biggest reason to choose a P1S over an A1.
Speed and reliability
The CoreXY motion system is faster and more stable than a bed-slinger, and the P1S puts it to good use with high speeds and excellent reliability. It is the kind of machine you can set running on a long print and trust to finish cleanly. Combined with Bambu's tuned profiles, you get fast, dependable results with very little babysitting.
Multi-colour and ease of use
Add the AMS unit and the P1S prints in up to four colours, swapping filament automatically mid-print, and you can chain multiple AMS units for more. Despite all this capability it remains near plug-and-play, levelling and calibrating itself just like the A1. The main concession to its price point is that the base model has no built-in screen, relying on the app and a simpler interface, which is a minor quibble given everything else it does.
The honest downside: price and the screen
The P1S costs roughly double an A1, and that is the central question: do you need what it offers? If you print only PLA, the answer is probably no, and the money is better saved or spent on filament. The base model also lacks a full touchscreen, leaning on the app instead. Neither is a flaw so much as a positioning choice, but it is honest to say the P1S only makes sense if the enclosure, speed and material range genuinely matter to your printing. If they do, it is superb value for what it is.