The assembly is very easy. The blinds keep well at the window - even without the prepared double-sided tape to the toolholders. With a little skill can be the arrangement of the cable change (left / right) without the blinds hanging high differently.
As described in other reviews, must be deducted for the actual covering width about 5 cm, since the dimensions given for the carrier apply. However, this is in all other manufacturers also the case. If you only know when you order such a roller blind.
The quality is perfect for the price ok. It is comparable to the Duo-Shades of zalreichen discounters, in my opinion, an absolutely great value for money.
Better quality (such as higher-quality plastic) you only get at overpriced blind-brand dealers.
All in all highly recommended.