+ Very attractive design, noble and simple, so that the box well integrated in various decorative styles.
+ Good workmanship, no cheap seams, the box is solid.
- 15-20 I would find justified, 30 I think clearly for a simple plastic box too much.
- The cable terminals (wire strips) are not even particularly easy to handle and look very cheap.
(The black plastic strips, with which the cables are usually tied together by newly purchased electrical appliances, are much more practical.)
Conclusion: I'm glad to have a box, but would not get a second buy me at the price.