I bought a motor similar, not the same though. I tried it out and the prop fell off in some kelp. The motor is kind of cheap it turns out. Otherwise it was okay, the speed on my PA14 was about 2.5 mph, a little slower than peddling. I recently tried it out again and it worked okay, helps when you are going a long distance against current or wind.
How ever, when it came down to getting on that spot you have marked on the GPS or controlling the direction and speed at which you pass over or approach it, the peddles were by far more efficient.
I had the battery stored in the bow compartment, which added some weight up there. I found that when I moved forward a bit that the water would come up through the drive well and was going into the rod tubes, resulting in a small amount of water inside the yak when I got back to shore. I plug the bottom two holes and that seemed to fix that issue.
Also, with the motor I would have to lean forward a lot to change speeds or forward/reverse. That was a real PITA, I couldn't just drop down as I came to the spot but instead had to stop the motor and maybe even go in reverse to avoid going past the mark.
My opinion,unless you have a disability, stick with the peddles, the exercise is good for you. And if you are going to use one, get one with a remote control.
Try these on for size...
http://www.islandhopperoutboards.com...for-hobie.html