I don't use fenders. One of the reasons I bought an aluminum boat was to get away from worrying too much about dock rash, etc. On another large fiberglass boat where I did used them, I just used regular old fenders with a lanyard. Couldn't tell you the brand but probably the least expensive I could find. That would of been before internet. Got rid of that boat back in the early '80s.
Anyway, I looked at the link. Those look pretty slick and they make one specifically for your boat. Like you, I might be a little concerned if they relied only on the suction cups. But the company claims their design works.
Congrats on the new boat. Hope you post some pic's