I've been looking into both Robocutter and Flowbee as I am rapidly approaching my first haircut since I started wearing HD hair, and I am dreading it! The very thought of messing up is pretty frightening. Oh well, it's only hair. it'll grow back (just not all over, hehe).
Anyway, after what you posted about the Robocutter, it kind of cemented my initial decision which was to go with the Flowbee. I've heard many good things about the Flowbee (and it even comes with its own little vacuum thing now, at an extra cost, of course) and they re-sell at a high price, too. So if people are willing to pay a substantial amount for them in a used condition, there's got to be something to that, right?