“After Initial un-rolling the mats were slow to inflate but I had read in another review that these type of mats require to be inflated/deflated several times before they respond as intended and that was the same with mine. However to get the full 10cm and/or a firm mattress additional forced air is required. My mats are intended for actual use next month so performance has not been tested. The valve seems as though it will be a weak point from a leakage perspective but so far with limited testing no leaks. I am pleased with the purchase.”