I have been to Josh for a couple of general tune-ups, in addition to smaller, more specific jobs, such as replacing my gear shifter, saddle, and tires.
Every experience has been positive. Josh works quickly and for a reasonable rate (he once replaced my gear shifter in under two hours and for under $40), plus he's the owner and sole employee, which is (in my opinion) super cool.
Another neat thing about the shop is that there is a certain amount of resale happening there. I bought a like-new Schwinn bike saddle for $5! I just dropped off some studded winter tires I won't be needing anymore, and he gladly took them.
Trustworthy spot, I'd say :)