I had a Hyperball a few years back.  That and a Rapid Fire.  The Rapid Fire was such a bad seller for Bally they ended up turning the remainder cabinets into Centaurs and EBD Deluxes. 

They're fun to play for a short time but you get tired of them very quick.  If you have people over to play they'll get played as they do have a novelty attraction but if you're wanting one for strictly your own playing I woudn't recommend it.