I put these on my spesh front and rear when they first came out, I was given them to test by a friend who was sponsored to ride maxxis tyres.
I hated them! they rolled over,lost grip on the front,I had no confidence in them at all.
Then, I rode a yeti on a demo day.I commented how good the tyres were and upon inspection found them to be Crossmarks!!
However, the front was being run (ran?) back to front.
I put them back on my bike the "wrong" way round and they're still on now.
I've had them round dalby in the wet and bone dry,the lakes,whinlatter,Gisburn,Ilkley moor,Baildon moor,Ogden moor and I've raced them in the Calderdale mountain bike marathon,which is good mix of terrain.
They aren't the best tyre in the mud but they do cope and as long as you spin them quick they clear fairly well.
I've not punctured them yet either.
I see them as I see my cyclocross tyres,they dont work well everywhere, but they're fast and 90% of the time thy're great.
the only place I change them is Llandegla in the wet.For some reason those little chipping stones that poke through the surface of the track make them slide like a hot knife through butter and it's "iffy" to say the least!!
Apart from that I love them.