i have a set of these, basically they are 26" road bike tyres, with all the probs that entails (punctures, tarmac only, a little scary in the wet etc.) eventually i decided to go for some 1.25" touring tyres (panaracers) cos you can use them for light off road too.
these have super low rolling resistance tho and you wont find a lighter pair of tyres for your 26er