I got one a couple of months ago and after always being land based find it a great way to get to places that were normally out of reach.
I fish Brisbane waters(central coast nsw) .Have caught flathead,bream,whiting and blue swimmer crabs.
Just fished Terrigal haven Sunday morning caught 12 calamari.
Lip grips and a net are handy(not easy to deal with flathead and crabs without them).
I put an esky behind the seat and a keep net over the side.
Longest I've been it it is 5 hours.
Legs and bum can get little sore but there are plenty of places to pull up to for a stretch.
Stability I find to be really good.