I have had a Port a Boat now for about four years and it is a toss up.Several things to consider.
1. It does not tow well, mine has swamped 3 times in comparitively mild conditions.
2. Carrying it aboard is an OK method but if you fold it, storing the
seats and transom board is a PA on a 32 footer.
3. I do like its free board and stability.
All things considered, I would revert to a large pontoon rubber boat if I were to buy a new tender.