I have the BigDog Alpha MP Series, 48" model. I have been plagued with belt breaks. I had my mower a little over a year and my drive belt has been replaced 3 times and the mower deck belt has been replaced 4 times. This seems like alot to me. The local place where I purchased this machine was charging over $90 for the mower belt and over $50 for the drive belt, and yes this was for the belt only. Of course all drive belt breaks are always at the furthest part of my property when they do break. Don't know what the problem is but this is getting tiresome.