I really like my Gekko. It serves me well. I'd concur with the wrist mount over the console mount, for basically the same reasons as String said (plus general ease of use).
As for whether it's easy enough for a new diver, I had mine completely figured out before the checkout trip for my OW class, but I'm a geek, so that might not say much. My significant buddy (in Japan now) and I went on a little dive weekend a little while after that, and I taught her everything she needed to know to dive it in a matter of maybe 5 minutes. When her older sister started diving, I recommended the Gekko. She picked up diving with it in no time flat, and it wasn't hard for her to understand the deeper settings (nitrox, alarms, etc).
Go for it. (And as for the "their computer/table/schedule is more liberal than mine" thing, don't worry about it. If it's a big problem for someone, you're probably not a good match for them, anyway -- and anyone can call any dive at any time, after all.)