The Predator 13 is a great platform. Does great on the river, and I've had it out in some wind and weather that I really shouldn't have been out in including some 3' plus waves that were rolling over the bow at times. I've never felt unstable or concerned in the Predator, at 34" wide it's rock solid. The seat is super comfortable and I've tried the Jackson 2.0 with lumbar, WS Ride Air Pro and the FeelFree Lure seats for comparison. I would say the Old Town seat and Jackson 2.0 are tied for first with the others falling in behind. Tons of room for gear, I frequently do overnight river trips and can easily fit everything I need inside the hull (and I don't pack light) while still having all my normal fishing gear in my crate along with a soft cooler in the tankwell. It's pretty easy to rig with the replaceable rigging plates and additional room on the rod pod in the center. I run a HB Helix5 SI for electronics with a no drill installation that allows me to remove everything and that's easily accomplished the way the Predator is laid out.
One con is that it does catch some wind, but many kayaks do. Another for me is that there is no factory solution to access hull space in the rear of the boat. Some people cut in a hatch back there and there is a space for it, but I'm not a huge fan of putting a lot of holes in my boat, so it's just a small issue for me.
This was my first true fishing kayak, so it's good for a first timer. I actually feel like the stability and comfort has decreased my learning curve because I'm able to stay on the water all day, and then do it again the next day.
There is a pretty active Predator owners FB page with a lot of great info on the Predator line of kayaks. Old Town Predator Owners FaceBook Page
If you read through some of those posts you'll note that Old Town has some pretty incredible customer service, which was a big decision point for me. Lots of info on rigging and how people all over the country are using their Predators.