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This review is from: Sureflap Microchip Cat Flap (Misc.)We were having problems with one of our cats misbehaving in the lounge and another cat coming into our house and spraying. This solved both issues. We actually put it in the wall of our lounge so our 'good' cat can go wherever he wants and other cats cannot.
Installation was straight forward - I am in no way a DIY expert - and the registration of our cat was easily achieved with a little encouragement and a finger of marmite. He has no problem using it at all.
Note that this device doesn't have any fancy 'modes' for night or other situations but it does the required job very well.