Heat beads for medium-length cooks of 1-2 hours. Why? They don't last as long as the Webers, and the heat drops more quickly. But they're good enough for medium-length cooks, and they go very hot (a little hotter than the Webers), so you can get away with not using quite so many.
Supermarket jobs (usually Sainsbury's or Morrison's) for fast cooks like burgers, steaks, kebabs, jerk chicken, of 5 minutes to 1 hour. Why? Completely unreliable, so no good for longer cooks. But if you need hotter than a chimney full for your steaks and burgers I'm not cobvinced you're cooking them the right way!
Steve W



