I regret it. Hands down. It is absolutely worse from a practical standpoint than the much older X1C I have, and the absolutely maddening part is that the "worse" bits are mostly software related.
You can hate on Bambu all you want (and frankly - a good chunk of it is well earned, but some is exaggerated or false) - but it feels like they use their products, and they care enough to fix the rough spots.
So while I like the ideals of Prusa... I can't say I'm super impressed with their latest offerings. Bambu's ecosystem is justly WILDLY better. The slicer is less annoying, the printer is more consistent, the monitoring tools are better, and most importantly - when I hit print, it just fucking does it.
I've had the Core One for less than 3 months, and I'm already into the double digits for number times I hit print and I come back 5 hours later to find.... it hasn't even damn well started the job. Instead...
"nozzle wipe failed. Retry?"
"different filament is loaded. unload? Select No to start print" (side note - it's just fucking wrong here, the filament from the correct MMU slot IS loaded, I just did it manually at the printer because if I don't and I switch materials - the next print is a guaranteed failure. The MMU is a whole different clusterfuck of bad software design, cool 3d printed engineering, bad software design)
"Nozzle clean failed. Retry?"
"The bed appears to be unlevel. Perform leveling?"
"Bed heating disabled due to inactivity" (This one still stumps me, I hit print, and came back to this message - my guess is nozzle clean fail and this just dismissed the first one... but who knows).
"Nozzle wipe failed. Retry?"
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Basically - I am fucking tired of "Core One needs your attention!" popups on my phone. Especially for the stupid things like approving a nozzle clean retry, or re-leveling. I am also sick of wasted time thinking the machine is printing when it's not.
Right now, I would absolutely buy a Bambu over anything else in the market for FDM.