If you enjoy sub 5% beers and lagers especially then it's a fantastic service. Otherwise, it's not really worth the expense. You'd be better saving the money and choosing your own stuff at a bottleshop.
The box was often like playing roulette in terms of quality and on a couple of occasions it was more like Russian Roulette. It seemed like an endless stream of lagers and pales under 5%. To their credit, you do get a lot of exclusives in the box, but they don't tend to be anything mindblowing. When they got an exclusive deal to introduce two Oskar Blues beers into the UK, it was a Mexican styled lager and an American styled wheat ale. Both were most acceptable, but considering some of the beers Oskar Blues do it was a massive disappointment
The lack of choice was an issue for me. In an effort to overcome this not uncommon criticism they introduced a preference service where you could indicate the type of beers you prefer. My selection of IPAs was soundly ignored an my box contained the maximum number of darker beers available that month.
Their claim that they will be supplying beers you can't find in the supermarket is misleading - I've had plenty of supermarket staples, including Brewdog's This is Lager, Dead Pony Club, Black Isle's Yellowhammer and Fyne Ales' Jarl which you could probably find in your local cornershop, never mind supermarkets.
I've cancelled due to the frequent disappointments and signed up for this beer club instead. Introductory offers for Beer52 tend to be very good, so I guess it won't hurt to give them a try.