We made the switch this year, and although there are certain aspects of the pup I miss (ease of towing, park just about anywhere, take just about any campsite and store it in the garage) overall we like the TT much, much more. Having a bathroom and a shower is awesome not to mention all the storage and extra room. I also love being able to pull over at a rest stop and go back to the fridge to get something to eat. (Couldn't access the fridge on the pup without setting up)
I still loved the pup and will always have fond memories of the many wonderful trips we took with it, but I'm not going back!