I have 2 (didn't buy either), and I fnd the build quality is a bit low, especially the reflecter which seems to get damaged by the heat of the light on both of mine. They are also, IMO, very expensive for what they are
I think they are good value for the price seeing as the filter and light are with it. They are copies of the Rena Nanos I think (or some other expensive make) and when I find the spare cash I will be using the 35Ltr one for a Nano project. I think they look quite stylish.
Pets at Home have them at Â£50 so I may well buy from them rather than have it shipped (charterhouse aquatics ship for free)