I had a 355 for 11 months and traded it for a 365SAQ I still have. Only thing we didn't like about the 355 was the kitchen cabinet on your left as you enter the doorway. My wife didn't like that it blocked the door window while seated in the couch. Petty I know, but I had to agree with her. Other than that, the 355 has the center aisle up into the master. I originally loved it until winter camping and taking showers with the outside temp around 30° or so, the condensation wet everything in the bedroom. My only two complaints. The original 365 just has a flipped around kitchen, side aisle and darker wood. Oh, and 2.5 feet longer. That is the differences between the two models. We had an '11 355 and now have a '12 365... These are still the best floor plans for those of us with kids.
2012 Sandpiper 365SAQ weighing @ 15k, Onan, 2nd air, slide toppers, TST
2013 F350 6.7L Lariat 4x4 CC DRW,Viair 1007, Ride-Rites, Edge CTS, B&W
2001 Chevy 3500CC DRW 4x4, 8.1L, 4.10 gears w/ Detroit TrueTrac
2001 Ford Excursion Limited 4x4 7.3L,V/B Spring Mod, ProComps, Hellwig Swaybar, & other 'Necessities'