yeah thats what i heard to about xs, they say it has problems. But then again I dont know of any perfect Turbo kit. I suggest if you really want the xs kit, save up money so you can take your car to them and have them do the install and tune it to make sure eveything is working properly. If you do it that way and it still has problems then you will probably be able to have them fix it for free or at very low cost since its their fault.
Ya, I also dont think their product is that bad. I think its just faulty installs (not dissing people on the board that have the kit and have problems).