I Just put one on and I love it. It really helps when you are alone, and if you have help they don't have to get out of the vehicle or I don't have to lean over the front of the boat. The difference is the one for 279 has an extra roller on top, it says if is for ranger and stratos boats. I have a stratos and see why, when I unload the front of the boat goes straight down and would hit the top of the latch. With the roller on it helps by pushing your boat away from the latch. I have been with a guy when he loaded with a 20 foot skeeter with a drotto, he doesn't have the roller and worked perfectly. I read reviews all over the internet before I got one and I could not find a bad one, that is why I bought one. I love it!