Can only speak to the 26"(559bsd) size, but fwiw a strong rec. here. I've used both 1.5" and 1.75"; a pair has lasted me typically about 4000kms before any significant rear tire wear; one flat over about 9000kms so far, and that was a thumbtack sitting nicely upright - what can you do.
I've found: in the TG folding version, what I use, that they are very fast-rolling, very comfortable, really quite light considering the protection offered. I would strongly rec. the folding version -- these are very easy on/off if you do run into a problem.