Is there a way to compare pass rates? I heard a word of mouth rumour about one of the listed school's pass rates being quite poor in comparison to the other ATPL theory schools in the UK. I trained at ATA, Coventry (long since gone) - an excellent school, such a shame it ceased to exist.
I'm in agreement with "combineharvester," most people have experience of one school only so I guess advice is generally going to be very subjective.
Good luck!