The following points are crucial for my rating:
1) Solid construction, sewn neatly, this before the first star.
2) to save space, the rotation you have to get out quickly. For the second star.
3) Thanks snaps and carrying handle to transport super (folded). Stern Nr.. 3
4) Two of the power windows can be opened, all windows can be darkened. Stern Nr.. 4
5) Practical Cases & shelf complete the picture - Stern No. 5..
All in all, highly recommended.