I used one for several years with the 30 Amp 5er we owned. Purchased a new 2016 TT a few months back with 50 Amp service and had planned to get a new autoformer for 50 Amp service. I kept putting it off until this past weekend when we had stopped overnight at a KOA. I checked the voltage on several occasions and did not see it over 110 volts. Perfect situation for the autoformer. Made my mind up...time to order one.
Ordered one yesterday. Decided to pay a little extra and get the newest model with surge protection.
Should be here for our next trip over Labor Day weekend.