I like them in that they fit together tighter than the ECB yet cost half that of the WSM. I have only seen them online and have been to HD quite a bit lately. I'll keep looking.
Yesterday was my first time seeng them in HD. I was hunting down Kingsford. One store was out and the other only had 4 2-packs. Sometimes I hate the holidays...
If the construction of that is anything like the construction of their 'kettles', a WSM will outlast it fourfold. I saw another WSM knockoff at BBQs Galore last weekend. Same issue.