i did mine at cranfield. i can't say if it's the best or not, because i have no experience of any of the others. the only time cranfield is a real git is when the wind favours 04. then you have to come down the ndb and do a circling to land, and is annoying. i got to know the controllers there, who are a really friendly bunch, and very used to training aircraft, and really help you out if you have the exam callsign. i got cleared straight into airways from the ground (not the controllers at cranfield who did it, but i thanked them anyway). all the routes are fairly easy, especially east mids as it gives you loads of time to settle down, and get to flying. coventry is a bit taxing as it's straight down as soon as you hit the airways. the only time the airways get a bit annoying is when you have to do the stony/welin arc, to get into airways, but usually latcc clear you into airways on trac daventry. going back to the controllers at cranfield. i partialled my ir and had to do the ils again. i didn't have to do a hold, as i'd passed that bit, but the examiner said i would be assesed on my hold if i had to for atc reasons. so i trundled up the tower and asked them to either make sure i didn't have to do a hold, or keep me on the ground, until the hold was clear. it's a bit of gamesmanship, and i really thanked the controllers after that one. the weather is usually good enough in cranfield, so i would have to say all in all it is a very good airport to do your test in. hope this helps