I’ve had a mixed relationship with mine- a medium 27.5, and I’m just under 5’10. Bought new in February as a custom build, without demoing.
Sizing- as above, get it right. Until I put a 70mm stem on I thought it was too small- I’d still like to try a large but its an expensive change. I demoed a Spitfire and had it been cheaper, I would have switched.
The stock shock does bottom out easily- I have volume reducers to fit, but it comes with second largest in there already so not sure how much of a difference it will make. The Spitfire had a CCDB Air so a better shock. A CCDB Inline is on the want list.
Forks- ran mine at 140 for ages, took them apart to clean and popped them up to 160- feels better if i’m honest. Bottom bracket is low.
Its a good bike, still room for improvement.