Donny says:
Avoid Alaska. Run by a nasty old witch, have some funny ideas on cancellations and are well expensive.
Enterprise are much better these days. Granted, that still make them pretty shitty, but you can't grumble at the price/location.
Unit 9 is okay, just a bit out of the way.
Karma in Stoke Newington are great/cheap. But PA's are a bit weak.
A weak PA is no PA