I've had my paddle ski for more than a year already, so I can give you a fair and somewhat knowledgeable review:
Setup: The boat is easy to carry and set up, it takes about 10 mins to have it ready, with a foot pump. Carrying it is somehow hard, because it weighs 60 lbs and it's bulky. If you have storage problems, as I do, this or any other inflatable will be a solution, just roll it and store it in your car trunk or closet.
Performance: The most important part of a review, isn't it? I have to ask you, what are you planning on using it for? lakes, open sea?
The boat handles well under hard conditions, i.e. high tides with 3 ft waves in the ocean, BUT BEWARE, wind is a big obstacle to this boat's performance. because the boat is raised from the water--thus making you ride on top of the water--it performs poorly under strong wind conditions. A hard shell kayak will perform much better. I have paddled it under very strong winds, 15 mph, and struggled to go forward in a straight line, let alone advance.
Tracking: This boat is wide, (3ft) and it does not have a rudder. Instead, it has a couple of skegs, one under each pontoon. Being wide, while it provides great stability =) , will undermine tracking. That's why the kayaks made for exploration are narrow and long, and have rudders. They track faster and straighter.
Stability: A big plus!!! I have paddled this boat under rough waters in the San Francisco Bay Area, and I have never been tipped over or rolled. In fact, due to its design, it would take probably a 7 ft wave to make it roll, otherwise, it's more stable than any other kayak. You can get in and out of it easily, and it will not roll at all. That makes it perfect for scuba diving, swimming, fishing.
Storage: Capacity is a plus, but the fact that your stored items are on the outside can be a minus, since they are exposed. I have gone camping for 5 days with my wife and dog, and I have been able to put tons of items on it, with no problem. I have to attach everything so it does not fall, and also use dry bags, so nothing gets wet. But you see, capacity is great. I'm 6'0 ft 190 lbs, my wife is 5'6" and 125 lbs and my dog is 45 lbs. All of us plus the load are able to fit well in the boat.
Comfort: The seats are also inflatable, so they are not that comfortable. It takes a while to find a position where you can get more comfortable and make your paddling more efficient. Sea eagle has just released newer seats made of polyethilene, I believe, which should provide better back support.
Extras: The boat can be purchased as stand alone or with a series of add-ons: sail rig =)
rowing frame, motor mount (for electrical motor, only). I purchased the whole package.
The sail rig set up is long and complicated, with many fittings that have to be assembled. It takes about 45 min to set it up. The performance of the sail is ok, although is not as good as a lido or any other of the small sailing boats there are. On person can easily steer the sail and tiller (the helm). Two persons fit well while the sail is up, although the person on the front can be a little uncomfortable, beccause on the front is where the sail rig fittings are placed.
The rowing frame did not pass my test; it was very very clumsy, mostly because the boat is wide. Rowing frames need to be narrow. I have not tested it with a motor, but I bet it will perform well.
In summary, if you value stability, cargo, versatility and ease to store, this boat's for you. If you value performance and maneuverability, you should be looking for a hard shell kayak.
The 435 is roomier than the 395, when used with the sail rig, the person on the front has a reduced moving area. The person can still sit well, though, and enjoy the ride. When you rig it, make sure you leave the boom high enough so it won't get on the front rider's head's way. Now, the perfromance is ok, it tacks well and can go up and down wind efficiently. The tiller is a little bit hard to use, since you have behind you, and not at your side, as in a regular sail dinghy.
The sail set up takes a while the first time; however, you can dismount the whole assembled sail from the boat and store it assembled, so the next time you'll need it you can mount it more easily. My guess is it would take you 15 mins to mount it back. Since I don't have much storage, I have to totally disassemble the sail, and redo the whole process every time I want to sail. And yes, it takes time.
The boat paddles efficiently under light to mid wind conditions. In fact, since the boat is riding on top of the water, you get the "gliding" feeling when going through waves, as opposed to other kayaks in which you have to "cut" across the waves. What we have found out is that the main factor for paddling efficiently is the rythm between both paddlers. Synchronicity makes it a lot easier to paddle, and that can only be achieved through practice. Something I forgot to tell you is that the seats can be placed at any position along the boat, so one person can easily paddle solo. Also, if you put more weight on the front, the wind factor gets reduced significantly.
The boat's durability is good. I have landed it on stones and gravel, and it only gets some little scratches. The material can withstand abrassion, and can be punctured only if you stab it with a knife. The aluminum yokes and loops are sea worthy. What I recommend after using it in salty water is to give it a rinse with fresh water. That will make it last longer. The foot pump; however, developed a little crack after constant use, but it was easy to fix with a patch and glue.
Hope this answer your questions. If you have more, don't hesitate in contacting me