From my understanding Grand Crown hasn't been around for a few yrs. I dont know who was selling the TS I bought in 2007. I do know that I have been using II and I had to contact them directly and bank my weeks and I have not had any problems with II. When they were using Grand Crown the reps were nasty and I was told that since RV didnt have a building I couldnt do anything. Since I have been dealing with II they have been very nice. We are using ours to swap in Italy next yr.