Mine broke within a couple of months. Emailed Gremlin four times and no response! I also tried phoning and no one answered... so aftersales = sucks.
They're great at selling them but if it breaks forget it. FWIW the data cable broke on mine where it comes out of the back of the unit - whether or not this has been rectified now is another point (it's on a huge dongle type of connector and it puts excessive strain on the cable - I never bent it or anything like that)
Never had any lag playing games ~ nice and easy to use/setup... lots better than your run of the mill stick.
Damien D has something along the same lines but built by a different company... I forget what it's called now but alas, they don't make those anymore!