Looks like the price has now gone back to where is should be i.e Â£15.
I did one of the Brewmaker IPA kits sometime back. It turned out about the same as the old Coopers IPA kit (the one that's no longer available)
I would not buy at Â£15, it's one can at the end of the day. By the time you add the other fermentables you may as well buy a premium kit. Or if you want to experiment, a Coopers or John Bull one can which will work out cheaper.
However if you bought one of these at a knock down price good on yer.
Patience is the friend of the Homebrewer.