We do a lot of dry camping in national forests and state parks which are rarely level. When it was the back that needed the blocks the smaller ones just didn't cut it. So we purchased a set of these and love them. Have had no breakage issues so far and used them several times over the summer. For us, traveling in the 2100, the issue is weight and where to store them. Have tried a few locations, but under the table is their current home.