The installation was not very difficult in itself. Move the frame to the desired position, screw (thanks to wood it went without boring), connect everything, screw, activate and set it to the cat. Here move the cat to keep her head under the scanner was the most difficult part. Then still select the desired mode and our cat was properly recognized and lock or unlock the door.
The build quality is fine but could be better in some places. The plastic creaks a bit, have cable inside too much play and the scanner depends quite shaky. Due to the low weight but I'm not worried. The cables are neatly long, and it could cause problems in people with thick walls of houses. Our wall is 40 cm thick, which is why the scanner had to be mounted in the cat tunnel. One can purchase extension cable, but for 20 euros at the adjacent highway robbery. With a little skill you can tinker own also.
A 9-volt battery is not the way in, where would we be current on the subject: On the lid also works only with a battery (only the timer mode can not be activated). The problem is that to be the scanner without plugged into an outlet (connection inside) has a significantly shorter range. The cat must press almost to the scanner its chip, so that it is recognized. With power from the wall outlet is the cat much earlier detected (range so 20-30cm). Sorry, no power outlet is in reach of the cat flap, so we had to connect via extension cable the device. An extension adapter for the transformer is on the way and is available for around five euros.
Operation is with the dozens of keyboard shortcuts extremely hakelig why one should have in the manual always. Instead of a simple LCD display you need to know the state based on blinks and beeps. To z. B. the closing times (how long the shutter stays open after the scan) set, you have to endure an infernal noise about himself. For a device for almost 100 euros I would have expected more since.
Who has his cat (s) is not chipped, still needs to anticipate further costs. Our vet has let the five minute minimum intervention cost 30 euros. In multi-cat so it can be even more expensive.
Conclusion: The cat flap work and doing their job, but the installation is a bit fiddly, if space is not sufficient and the court must probably be considered. It is limited by the availability of a power outlet and the length of the cable. Need for improvement I see especially on the sides, as they mostly consist of cavity and thus make the flap unnecessarily wide.
The problems during installation relate to my experiences. For friends of us, it was a lot easier and a matter of minutes. The experiences can differ so.