It was a disastrous failure, its big demonstration test turning into a terrifying (but comedic) fiasco.
In real life, it never made it into service. However, in the Operation Sealion book for Bolt Action it appears as a novelty weapon option, so you can pretend that it did actually get used in anger.
Pictured is a render of a 1:100 scale model of the device, 3d-printed by Shapeways. You can get it at http://shpws.me/Oy2Z in either WSF or FUD.
It's a bit expensive in FUD, because the central hub is solid and there's nowhere to allow for escape holes. I might try making it in two halves for assembly; that should bring the cost down a bit.