Checking back in; bike is working fine.
About 2 months after I got it, I took it to the LBS for a full tuneup, no problems.
I'm still having an issue with the chain falling off the front chainring on certain types of bumpy terrain, so the LBS has a couple of models of chainguards available; I'll have to install that at some point.
Something is making a weird creaking sound; I think it's the pedal spindles on the stock pedals starting to fail; I have new pedals but didn't put them on yet.
Total mileage is not high, I'm doing about 10mi per day about 3 days per week.