I have a 2008 Pastiche, pretty solid 'van and in great condition for its age. I think it does vary a bit with the year but generally Coachman are regarded to be at the premium end of the range when it comes to build quality.
2011 Pastiche 560/4 here. The build quality is meant to be good on Coachman, but I've heard a few mumblings about new models being built down to a price and having problems.