In reply to yorkshireman:
I did it last year.
A superb race, lovely scenery, especially the second half.
It was incredibly well organised, the start was chaos, but the actual race was superb.
I really recommend it and woul certainly run it again. There were issues at the start, bus transport, not enough toilets, water etc but on the actual race course it could not be faulted.
Bit of everything, very much a trail race more than a mountainous ultra like the UTMB, you stay lowish for much of the race but have some long climbs.