I have had 4 coaches and on the first 2 I installed Allure (the one with the adhesive edges) - never again. It started to lift and peel because you can never full float an RV floor due to the weird L shapes, bolt down furniture etc.
Tile I have no direct experience of in a motorhome, but I have done a couple of mobile homes and have had grout issues with floor flex and a friend has a Monaco Dynasty with tile that is now starting to crack and move - plus the weight factor.
I have followed a guy called Eddie on IRV2 and seen some of his work (he remodels RVs as a living) and all I can say is WOW - he uses engineered wood and glues it down and the results are simply spectacular. I will be doing mine in an engineered bamboo this winter, using the same techniques he does.
But, it's more expensive in terms of materials and labor and so doesn't suit everyone.
