You can utilize the search function on this site to get more threads, there's plenty out there since I def pondered the same Q in the past.
http://www.vehicross.info/forums/sea...by=&sortorder=
I don't know if anyone has any concrete data on how many VXs failed, had problems etc. But everything you get on here are from proud owners (or ex-owners) of VX, there's bound to be some shares of optimism and bashing.
I treat the VX like any other cars I've owned, maintain well and keep up to date on fluids and trouble signs...that's the least us VX owners can do for such an unique vehicle.