Small, easy to dial in, rock solid. Yeah, btw., it's a chorus pedal and it's really miniature size! The true bypass is a good bonus.
The only thing that I don't like is that super bright LED between the knobs. In dark it makes your eyes bleed.
Some may complaint about the missing white dots on the mini knobs, but I always dial in my sound by ear, not by eyes, so I don't care about that. I own a TS9 mini as well and had no problems with it. If you dial a sound that sounds good, you don't care about knob positions!