Blyton is good fun and they've certainly done a good job with creating a track from the bleak airfield it used to be! It's a mix of slow and fast corners and a few straights to allow car and driver to stretch their legs! It's not very hard on the car (important when driving to and from a track day) and has loads of run off areas so if you do make a mistake there's a good chance it will go unpunished! I'd certainly recommend it as a venue!
Apex Trackdays were very friendly - I'd recommend them too!