I can't speak from a salt water perspective, but can tell yeah a few things. It is very easy to use after a few trips. One anchor, a dock rope, and windsock will lock you down. I think it is a boat that is only best, with a good trolling motor; treat like it's a boat and not a hand launch.
They carry an insane amount of gear with ease, I would think having a frame would be great in salt. Some drawbacks with corrosion from what I have heard. You can modify them like crazy. If you don't have enough tackle/box storage, just strap another one on the back.
What I will say is that with a a tube and some Force Fins, you can be the best angler around in regards to stealth. There are some spots I fish, that I wish I had some. I have a huge expensive one, but I would probably be just as happy with a smaller version to be honest.
NEGATIVE: Wind sucks...