I have a 10 foot kayak rigged up for fishing. I like that I can just take if off the rack of my SUV and be right in the water. I have a rod holder and space for more if I want. I also have cleats hooked up for an anchor. I may try to put a sonar system on this year. It has its advantages and disadvantages. I can cover a great deal of distance in the kayak since I can move so much faster than in a pontoon or belly boat. However, I can't maneuver while I am casting like you can in a belly boat. The boat I have is a recreational model and quite stable. Getting in and out requires a little balance so walking and wading after floating down a river becomes a little trickier, but not much. It is a good option for fishing, especially larger lakes that couldn't be managed in a belly boat. Kayaks that are set up for fishing are often quite expensive. I just bought a regular kayak and added all cleats and rod holders myself. It wasn't very hard.
Jeremy