Congrats and welcome.
We also have the 21SS and just got back from camping in Florida in it for a week. We really loved the space in it compared to our old popup.
One issue we had on the way down was the screws that attach the base that our propane tanks sit on to the trailer all sheared off.
They were just 6 small self tapping screws. Fortunately the tanks didn't fall off as we were on the interstate. They did fall off as we were going thru a hotel parking lot. I got some stainless steel bolts and reconnected the base to the trailer while in Florida. Now it is rock solid. I have been in touch with RVW and they are going to re-imburse me for the parts and send a new propane tank since one of them got pretty scratched up and I am worried about it being rejected next time I need to fill it.
I did buy the Cipa tow mirrors for my F150 and liked having the better vision. I towed it home from RVW without and liked towing more with them.