Yes for what they are intended (i.e. not thick mud). Andy B (and many here will have now after the bargain reductions recently) has been running them for over a year now.
I have the 2.1 version and love them. A bit heavey though, for a 2.1 tire (I think about 600 grams, but not sure...)
now thinking of buying the 1.8 too! did you buy them at an ebay store?