I have installed now almost 20 pc in my living room and in the kitchen. The set is well packed. The LED lamps have a high luminosity. The mounting frame is very well made. Secure the assembly of the lamp is very sensitive, but this is more of a systematic problem since the spring should be as thin as possible. The installation is very simple. Preparing Pannele by hole saw, use the mounting sleeve, the retaining spring flaps again automatically. Simply the lamp connection via WAGO - connect terminal that really creates each. The installation of the LED light source is incredibly easy. Remove lock washer, LED lamp can be in base snap, put lamp in mounting frame and insert the lock washer back. added: Here are fine motor hands beneficial. In sum: Price-performance is optimum. Installation is self-explanatory. The brightness is good. The appearance well. gladly again.