I just bought mine a couple weeks ago right from PP website, installed myself. But I already had the paddle wheel in my boat. Didn't have to drill a hole
Install was a breeze. Especially if you are a technical person, it's a snap. Tested it this weekend and had no problems. Just need to calibrate it with my friends GPS. Definitely worth it. Good luck. Get with me if you have any troubles or questions on the install as I just went through it.