The 50 series BX was a short run due to different customer complaints with the abrupt stop in rveerse being the major complaint. Had one for short time and traded it to get rid of it. Neighbor has one and has had it for several years with no complaints. I checked his and it does have the abrupt stop in reverse but obviously not as big a problem for him as it was for me and many others. It should be discounted over the other series BXs since many people know about the issue(s).