Our scaredy cat
We used to have an ordinary flap at the entrance to a tunnel through house wall, but other cats were coming in.
The Sureflap works perfectly except that our cat was totally spooked by the dropping of the latch and the accompanying clicking noise when he was in the middle of the tunnel coming in (and this is the newer quieter model). He made ungainly exits, rear-end first, back onto the patio!
So we had to go back to the basics to regain his confidence going through the tunnel. First with a bare tunnel, then the flap with no batteries (no click) and propping the flap open, then the flap closed and finally the batteries back. I put strips of black insulating tape at the bottom of the flap so that he couldn't see the latch dropping either. This did the trick, and now, three weeks after the initial installation he is at last coming in - and the neighbour's cat - who was using it all through this period, is thwarted! Great product and a very helpful help-desk at Sureflap.