I can definitely chime in on a few features of the Humminbird. First off, as far as that quick release mount, I wasn't crazy about it either. But I have to say, I've had a couple of the 700 Series units and can honestly say that the mount has never given me even the slightest problem. It's nice that the unit just snaps in and out of there, and that the whole thing swivels. And it's free with the unit - not, like $80 like a RAM mount or whatever... And, as afar as the durability, here's one heck of an example: I've had a 700 Series unit on my duckboat since 2007. I have never taken it off. It sits outside in the rain, snow, freezing temps all year long. And, when duck hunting, the abuse is even worse. I have never had a problem with the unit, the GPS, anything. It comes on and locks up every time. The screen, believe it or not, is actually still clear and in good shape. But, honestly, I've done everything but literally smash this thing in an attempt to destroy it, and it keeps working. So consider those things when comparing. good luck
