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I've mostly gotten the quality to where I'm happy except for whatever it's doing to the bow of Benchy. Still some stringing but I don't expect that to go away completely with TPU. Hatchbox TPU, been lowering temp, lowering print speed, fine tuning retraction, etc. I can give exact numbers if needed, but if anyone knows what to adjust specifically for what it's doing at the bow that would be great.
Supports? I'm guessing no, and Ive had issues with TPU and overhangs like the bow there myself. TPU is flexible and thus sags more when printing overhangs.
No supports, the Internet (and if you can't trust the Internet who CAN you trust?) said I shouldn't need it for a Benchy.
I don't for PLA/PLA+, but TPU is different. At least in my experience.