The Luma feels good and is not too big ... but after the sample inflation in the living room we needed for two nearly 2 hours to the little air out again. Unfortunately no instructions enclosed with how to best and most effectively the mattress gets small again. (Oh yes, we do not have a Luma inflated for the first time ... but never had such problems, the air rauszubekommen) Not for campers who want to quickly get off / need.