FWIW--With my added lumber support, I have ZERO back pain--ZERO......did 30 miles my 3rd day with no issues other than newb start/stopping errors and sore "bent legs". The bike rides and tracks straight. There is a little pedal/torque steer, but nothing overly concerning. No issue hitting the idler w/ the FWD. Also, so far, no front wheel slippage. Biggest "downside" is that the small wheels do not carry momentum very well, but that is a trade off, as I appreciate the relatively low ground clearance, which means I can rest my leg (barely) when seated.