Why yes, yes I have! We have purchased both of our Montanas from Couchs Campers. We were treated very good on both deals with the second one being a trade-in. The first was a straight out deal, not trade.
The salesman, Brennon, was very pleasant and the service has been great. No problem getting anything fixed on the Montana.
They do have a web site also you can visit if you haven't already.
If you are serious about one, talk to Brennon and tell him I sent you. Good luck and happy shopping!
p.s. Any other questions about Couchs, pm or email me.