Over time, the suction cups in the roller blind detach and are difficult to install. They cannot be completely attached to a greasy and dirty surface.
The downside is also the very choice of material that can be easily damaged. It is enough for a child to catch something and a hole is created. The blinds' sides are not finished - another oversight - which looks quite unsightly. Sometimes, uneven material also prevents the blinds from rolling evenly.
Price is also scared off. About 100-150 zlotys for a set for mounting from two sides is quite a lot.
The only plus is an interesting design that draws the baby's attention and takes a few moments while driving.