Had a couple of the starter buttons fail on me, and they fail in the on position, so the starter remains engaged until it burns out. If this happens in flight i think you have no choice but to shutdown the affected engine. I recall the fuses being flush fitted, so you can't pull the fuse on the affected starter, which means it will operate continously with the master on!
Single engine performance is pretty much the same as all other light 4 seater twins, basically you won't climb with any drag and any climb you do get is pretty poor. If you put 2 average size folks up front and full tanks you will be at MTOM, so if you carry anyone in the back seats you need to trade fuel.
I felt it was better than a lot of aircraft in crosswinds, hence why the CAA amended the POH from a 15kt to a 25kt crosswind limit.
Hope this helps.