Ultimate supplies the seat with the mounts in place, and ready to install, so removing the OEM seat and slapping on the new one took about five minutes. Installing the passenger seat burnt another two or three minutes and the backrest probably took about 45 seconds. The Big Boy is somewhat wider than the stock seat and depending on your physical dimensions, positions you about an inch higher and further back. According to Ultimate, really big guys will find themselves in approximately the same place as they would with the stock saddle, just a little higher, but I'll have to take their word for it, thankfully, I'm still a few barbecues away from becoming "really" big. For me the seating position although only an inch different, made a world of improvement, it added to my leg room and let me straighten my arms just a wee bit more, which increased the comfort level by a noticeable amount.