I purchased these after having some great success with the Women's Piston 200 tight: I thought I would give Sugoi another try. These tights are pretty good on the whole - they're comfortable, easy to get on and off (the zips on the bottom near the ankle helps) and they run well (tested them out on shorter runs of 5 - 7km and had no problems). Some minor issues are a) the sizing - I bought a small previously and they were a tight fit, whereas the small in the RSR's is larger than expected (should have gone the XS) and b) one of the legs kept slipping down lower than the other as I was running and it feels a little strange. That could be a product of the not-quite-right sizing though.
I do like the style, and the checked patterning on the inside really does make these quite comfortable. I would recommend them, although for longer runs (10km +) the Piston 200 tight is a superior choice compared to the RSR tight.