I have a 2007 3612ds that i bought new in sept 06. 2007 was the first year they put the TV over the entry door. Much better design. The ugly bug lights on the back from 2005 and 2006 were replaced with nicer looking housings. The stereo was moved inside the trailer so its not an outside unit. I Had one blowout from the Carisle tires..replace them with Maxxis. Just replaced my batteries last year with 6v units. Yes the windows are small..lots of storage though. No major problems besides the gen set acting up from the crappy gas. The gen set door does get pretty hot running. Everthing still works..although the tanks sensors SUCK. More than happy with Keystone.