PeteWill wrote a review of Cutter 26in Premium MTB Tubes - 4 Pack on November 28, 2010
I bought two sets of these, one for me and one for a friend. After just a few weeks we have already popped 6 of them. At first I thought it might just be our tires just but after reading some other reviews I think these tubes may just be bad.
They may work fine for you but make sure you carry a spare.