Just finished helping a friend with an install. Set up was painless using the Navworx portal on a PC. It talks to the Ipad via WIFI. Everything is A ok. Thanks Bill!
I actually have the 600B connected to the 4500 in our RV7 and it works very well and see no reason that you will not be happy with the EXP version.
I think the EXP version is a little more advanced then our unit and less money.
We installed our 600B when they first come out, Happy camper but impressed with the newer EXP unit.
On set up you just choose the AFS unit should be painless.