I bought one a few years back for detail work on moldings in our house. First off, though made very well, tough, heavy duty, it's just not a great tool. Not all that useful. The little sanding pads wear out fast and the velcro on the attachment that they go on wears out too, then the sanding pads just fall off. There's a few cutting attachments, but for most stuff they are useless. I can easily say I could have got by without it.

Knowing what it does, I can't say that I can think of anything it would do very well building models. I've never used it to build a kit, and I can't think of anything where there isn't a better cheaper tool. You're way better off spending the money on a nice scroll saw or a bunch of hand tools.