Fitted some Maxxis High Roller 2.2 foldings on my bike prior to an Alps trip after reading on this forum that they were good.
In the dry they've been unreal!
In clay mud though I've found that they are quite dangerous - I'm talking complete loss of control - because they clog up irreparably, even if only touch the slightest bit of sticky mud!
Yesterday I rode a descent on Holmbury that begin with a steep muddy section. I noticed after riding that bit that the bike seemed to be sliding a bit, but carried on. Then the next steep bit came and the bike went completely out of control fishtailing, it was sheer luck that I was able to bring it to a stop without hitting a tree!
The same thing was happening a few weeks ago in Morzine (it was slightly muddy and ended up walking a lot). At the time I thought it was because the mud there was something special. But now I can see it's the tyres, as the same thing happened on my home trails and has never happened before - they're unsafe in clay mud.
I just thought I would post this to qualify the rave reviews of Maxxis High Rollers that I've seen here - they're good, but definitely for summer only...!