I have 2 x smaller versions of the Keter model above pushed together to provide a larger surface. They really are excellent pieces of kit. One of the biggest selling points is that all 4 feet are adjustable to provide a truly flat, stable surface. As mentioned above the surfaces do not discolour even after being out in the elements. Doors are lockable with a padlock so will prevent the wind opening them though not perhaps the most determined burglar! The stainless steel tops are supported on each corner by the resin frame but there is no plastic directly underneath. I have sided my Go Anywhere mounted on top with no issues at all. The Smokey Joe was slightly too close though and the steel did warm up but not enough to cause and issue for the resin.
I use mine to store my trays, lighter cubes, food gloves, smoke and probes, rotisserie engine and forks etc in one. In the other one I store my GBS accessories. If, like me, you have surplus tongs, brushes etc that will not fit on your grills hooks, the larger Keter model comes with 8 hooks and a beer opener! These provide excellent extra hanging space. There is also space under the lid where I put my grill covers in when not in use.
Mine are about 5 foot from my grills and I have had no issues at all.