not too bad, I went slow. didn't want to cut the hole too big and be screwed..directions said use a drill and a utility knife to cut the plastic back of the seat..forget that, I'd still be cutting and probably be short a finger or getting stitches right now..plastic backside of those seats is like 1/4 inch thick..got the dremil out instead, made short work of it..when you do yours don't take any of the foam out. direction pics show cutting the foam but thats not for RZR seats. They type that but you could miss it if your not paying attention. You just do a single cut thru the foam.