So we've been using these Cradle Cubes throughout the shop for the past week. Everyone loves them. You guys put a lot of thought into the various heights and also the flat sides for laying guitars strings-side-down. This has proven to be much more effective than all of the home made wooden neck rests we've made here. The rubberized coating is nice and grippy without sticking. Preliminary testing shows it cleans up pretty well, too. We normally use cork, but it is porous and absorbs fine metal shavings, dirt, etc.. and needs to replaced from time to time. I will definitely recommend this product to anyone in need of a neck rest.