Might want to check and make sure spare parts aren't going to be a problem. Haven't seen many online shops selling them. A-main had all GS products on clearance awhile back (maybe still?) like they planned on not carrying the line anymore or being discontinued.
Your friend's XUT probably has issues because of his particular setup. Truggies are very similar for the most part, so while some may be partial to having certain characteristics, it is generally how the vehicle is setup that makes the most difference.