I have had one for about 3 years. The abrut stop is an issue for some, it never really bothers me. My HST pedal is also a little sticky when the tractor is cold. The plastic hood, engine side covers and rear fenders has not been a problem for me, except where the engine side covers fits the cowl area under the steering wheel area. One of the tabs on mine has broken, and it doesn't fit all the great. It didn't fit all that great when new. I put a Kubota guard on mine to help protect the HST fan.
So far I would give my BX a 9.5 out of 10. No major problems and it does more work than I ever would have guessed. If you get a front end loader, it is amazing what you can do with the little beast.