We went from a 2005 29RK to the 2012 335SS. We had a couple of small issues (trim piece, shower door aligment) which were correct by Crossroads. There have been reported issues with water entering the bedroom slide along the slide "track" , we have not experienced<?: prefix = o ns = "urn:schemas-microsoft-com
ffice" /> this problem. There are some that have had issues with the bedroom slide aligment, see the Crusier section of the forum. The fireplace option was not up for debate , it was a must have so said the DW...lol. It gives off a fair amount of heat and we use it to warm the camper on those chilly mornings. We really are enjoying the layout. Unit actually tows nicer than the 29 RK. Can not comment on your other questions.