The Cobra Strike + (aka Re-Vision) was originally designed as a surf rescue craft and is in fact the "long board" version of the Cobra Strike. It features a large open cockpit and a unique overlap flange allowing for both a drier ride and improved hold on waves. The rocker design and unique flange combines for excellent wave riding, while the sleek hull design allows for a fast, smooth quiet ride on flat water. (Pictured with optional backrest and hatches)
I've had this yak for about 6 or 7 years now, and can't say enough great things about it. It's an all around multi-use boat.
For surfing, this thing is amazing. The length allows you the speed and ability to catch almost any size wave, and the fin and edge make for easy turns and carving. Simply shift your hips and dip a paddle and it goes exactly where you aim it. I've had it on swell ranging in size from knee high to 8-9 ft and always have a blast. Just note that on larger waves that you need to start out already angled down the face of the wave, because if it's steep she'll definitely pearl. Also, invest in the knee straps and a decent paddle leash. Both have been a lifesaver for me in heavier surf.
I also use her for day trips on the local rivers and lakes and she keeps up with my Necky 16' fairly well. With a couple of dry bags and the bungees I'm just as comfortable as a sit-in .. maybe even more so since I can dip my toes in any time I want ;)
At the beach I always have people come up to me after a session and ask about the boat, as these aren't easy to find around here. Most are impressed that I can ride everything that breaks (and lots of waves that don't) and usually am getting 3-4x the amount of rides as the other surfers out there - esp those on short boards holding out for larger surf.
I would say the only problem I've had with the ReVision is the eye grommets. The one's that came with it were a soft plastic that tended to stretch out over time in the hot sun - and eventually snap in 1/2. I ended up replacing them all with metal grommets and used silicone to seal up the holes and keep water out longer.
Other than that .. awesome boat. One that I'll most likely never get rid of.
If you're just beginning, the Revision is very forgiving on small waves. It doesn't take much to keep the boat going where you want it to. Edging into the wave to make the boat carve is only a matter of shifting your weight a bit.
I took it out a few days when the surf got fairly big (8 - 9' swell). I caught a few waves on a point break and wave flying. The Revision was surprisingly smooth on a fast wave. I got a few late take-offs and found that it didn't pearl as I thought it would, and that it did a bottom turn without much work.
The only reason I wouldn't give this boat a 10 is that the foot 'grooves' aren't very well designed to use your feet for pressure. They slip off. They need some sort of bar or brace across the footwell that can be adjusted.
If you are a larger person this is a great sit-on-top for surfing. Very subtle changes make the boat turn on a wave. I would suggest putting the fin on if you want to get onto some larger waves. With a seatback, knee straps and some sort of way to keep your feet on, it performs very well in small or large waves.