I wonder how long the batteries on those little guys last though... I'm planning to do this repair on my boat's stern the coming weekend, and I guess to sand the repair area the little 'Corner Cat' sander will work.
But when it comes to sanding the whole hull prior to repainting I guess I'll have to get a proper belt sander, or else I'll be needing a week just to sand the hull...

When I went to my local Home Depot I noticed they have many different Ryobi combos, some of them leaving out the handheld vacuum (you said above it's useless anyway for lack of suction) and the jigsaw (I don't know what to do with the thing anyway...)