Hmmmm now Ive seen quite a few things about totally enclosed filters on rolling roads that lost the car bhp but that said a silly little fan blowing on and into the engine bay cant hope to recreat the same amount of forced air into a enclosed filter.
As for quality, its hard to say, branded filters will no doubt have a better material for filtration and airflow compared to a non branded item, does that mean you shouldnt buy it

Jury is out on that one.
For the money it looks ok, not unlike the Pipercross Viper and the K&N Apllo systems.
Best advice is, if you like the look of it and you have the money then take a chance, it maybe good it maynot be good - who knows.