It was Grigg that mentioned it here a long time ago that got me to thinking about it. I think I paid like $300 for it. I know that sounds crazy to pay that much for something that replaces two pieces of steel and a wing nut, but that is one issue I don't have to think about anymore.
The BQ351 is the intro kit, the one I have, and the BQ350 is the pro kit and the difference is the pro kit goes to 1/2" and does the 37 degree AN style too. If you choose later to upgrade to the pro kit, you can just order the extra parts separate since the boxes are the same.