Flew TB20s a couple of times and didn't bother after that.
Agree with Bombay about the lack on control harmony. Very very heavy to control in roll. Many comments about the strip gauges .... agree with those too. Crap. Weird-o-rama push button circuit breakers. Yecch.
I liked kiwiblue's point about the 'brick' - like behaviour with the power off. We've all heard about ham-fisted pilots stalling and spinning in when they cock up turning onto finals. With the gear and flaps down this aircraft BITES at the stall. OK OK others do too, but not nearly as nastily as the TB20. Leaves very little room for error.
Let's face it, 145KIAS or so in a TB20 compared to 130+ KIAS in a PA-28-236 (for example) which has much more benign handling & no retractable hassles, only amounts to a few minutes over a typical GA trip.