* Prices may differ from that shown
I am not one hundred percent sure why you want an Anakin made of Lego attached to a keychain. As a Star Wars enthusiast, I would much rather it was a proper looking Anakin, or a Death Star or even a coin depicting a key scene from the movies.
You can buy Lego Star Wars on its own, without the chain attached so this appears to be another chance for Lego to make a few bucks along the way. If you really want you can rip the chain off and just have the man separately and then use him in your Lego game, to be honest I would probably do this!
The figure is bare on an inch in height and the size of all Lego figures, with the moveable head, arms and legs. It is supposed to be Anakin before he is transformed into Vader, but I am not very impressed with the likeness. He looks more like Sandy Toksvig crossed with Sarah Ferguson and is thus not very easy on the eye. The hair colour appears too light and red coloured and the lips look way too feminine. There eyes are also a poor likeness and he looks like he is wearing mascara.
The costume is slightly better with some pleasing design work on the torso and generally good colour choices. There is only so far that you can go with a piece of Lego, so I shan't be too harsh, but the figure just is not that good, especially if one considers there much better Lego Star Wars figures on the market. The price tag seems to vary, but a ballpark of five to six pounds seems to be the going rate. This seems inflated for such a small toy, but then I guess it is a novelty item. Worth buying? No.