Well said by Denny.
One of the things we have noticed is that a first time Prevost buyer tends to be motivated by decor or colors. After the purchase and after seeing other coaches and learning more about the systems by owning and using them, the owner realizes the new coach is not exactly what they wanted and they either wish they had done a little more homework prior to the purchase, or they end up taking a bit of financial hit, upgrading to a coach with a layout or systems to fit their needs.
There tends to be a lot of major choices such as over the road bus AC, private toilet, slides, roof airs or Cruise Airs, etc. The last person to ask for advice is the salesman.