I see the usual standard comments on Ovation guitars here. I like mine. They make some cheap guitars and they make some great guitars. And everything in between. So do Martin and most other makers. Just don't try to compare a US-made solid top Ovation (very expensive new though) to one of the cheaper laminated ones.
People have decided that a guitar made partly from plastic can't sound good - that's a pretty strong prejudice that is hard to break.

And the bit about how they slide off your lap. I just don't understand that part. Never happens to me.