I have to admit I had never heard of Uncle Wills Full Throttle Z Scale before. I bought a lot of z scale trains on line and was pleasantly surprised to receive several 2 car hopper packs in the lot. I did a little research and found this great little company that has been producing a nice selection of unique z scale rolling stock. The cars come well packed in a hard case with very attractive packaging along with an accurate history of the type of car modeled. One thing I noted with the Uncle Wills Full Throttle line is the unique selection. You will find a nice selection of hoppers, gondolas and cylindrical hoppers. The open hoppers come with loads from Hay Brothers Garage. If you want true variety in your collection, you will find it in the Uncle Wills Full Throttle Line. I have noticed that the sets sell out fast, so if you see something you like, and you will, snap them up!