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I went went the cheap grid and brick method before upgrading to the ceramicgrillstore product. The cheap method worked well for awhile, but it always lacked adjustability / multiple cooking options. I've since upgraded and couldn't be happier with my purchase from CGS. Hard to beat multiple racks for large cooks, or sliding racks for ease of turning or swapping cooking positions, or grate adjustibility for searing and wok'ing.
Get a bunch of cooks under your belt, then you'll realize what works best for your cooking style. We cook approximately 5 days a week on our XL, and I couldn't imagine going back to my original method.
Griffin's Grub or you can find me on Facebook