The Magnum (the Premium ones) kits are of a resonable quality if you take a lot of care and make sure they are finished and degassed properly, the Beaverdale kits are of a much better quality in my opinion
I'm off to the Brew shop tomorrow so I think I'll just stick with the Beaver, the only reason for my asking about the Magnum wine as ebay are selling four 30 bottle kits for £51.96 delivered.