In reply to Jonno:
Yep did sinister groove a couple of weekends ago and must say I was incrediably disappointed. The first pitch,as you say Jonno, is very heathery and not that interesting, the 2nd pitch is a real b****d of a struggle and then a short wall followed by rapidly detoriating climbing.
I honestly wouldn't recommned the route and presume it only gets stars for some historical significance.
Cleopatra on the other hand is excellent - 3 really good pitches and definately a classic - huge contrast with SG. And on a perfect saturday we were the only pair at the crag.