You wouldn't believe how non slip the non slip tiles are. We tried them out, socks off in the pool doing our best to slip n slide and it wasn't that hard at all, in fact there seemed to be little or no difference between the non slip and standard tiles. This was a little concerning as we are to tile around the walk ways of the pool, so a solution was needed to prevent health and safety having a field day with their slip-ometers. I'm sure they have such a gadget. The coloured tiles are to be laid with grooved oak hardwood being laid on top, with gaps in between to allow the tiles to dramatically shine through, thus it will be 100% non slip and the effect of hard wood on tile should be another great feature. After all if you've just had a couple of glasses of the afore mentioned fresh and tasty chilled whites and then want to dip your toes in the bubble tub, you don't want to have to concentrate whilst walking over there. And anyway our Lido flip flops or your flip flops should also aid vertical continuity.