Jochen E

Fundamentally, this is a very sophisticated product that's easy to configure and certainly represents a significant safety improvement. Less pleasing are the poorly written operating instructions, which are at times confusing, and the fiddly flap for the activation switch. A self-test that is incorrectly performed still results in a "OK" result and doesn't detect that the device cannot be activated (switch defective). This also speaks against the quality of the extensive tests that, according to the operating instructions, are performed before delivery.