I have recently bought one of these vacuum cleaners and I am very very pleased with it.
It is a nice and compact vaccum so doesn't take up too much storage room. It is also really quite light in weight so is easy to carry up and down stairs and is easy to manover around the house.
Although it is small and light weight I also find it has a good level of sucktion and is powerful enough to clean very effectively. The area where the dust gathers is quite large so no need for regular emptying and as it is clear you can see exactly how much dirt has been picked up and how full the dust compartment is.
I also think it is a stylish looking cleaner. It is in a bright blue / purple colour which is pretty and the shape is nice as well as practical. The cord winds inside the vacuum and the attatchments come off again for easy storage.