Two aspects 1) People don't like them when they total throughput turns out to be less than before, which tends to be the case - especially when people notice t

Two aspects 1) People don't like them when they total throughput turns out to be less than before, which tends to be the case - especially when people notice them. This is quite common as they often replace 1 passport officer with 1 e-passport machine. 2) As a user they are more difficult to use, and no faster. For me, manual passport control into my home country involves dropping my passport on the desk with one hand, standing for 20 seconds, then leaving. For e-gates it means opening it up (usually a two handed process), sliding into a reader, making sure the crinkly passport bit doesn't scrunch up, wait, wait, wait, half the time get told to reinsert, wait again, look at a camera, wait, wait, then about 1 in 4 times get rejected and have to do the manual process 3) For the minority of people who had iris, they replaced a system which was better for the user in all ways Iris itself was of course a security issue - it was no longer something you have + something you are, it was just something you are, which was the beauty. Have too many people on the system and you get false positives and end up with a tremendous mess Of course the best innovation in passport control in the UK would be to join Schengen, so we don't need passport control for the majority of arrivals into the UK. Would save a fortune and make everyones lives easier.