Anyone had much success with those metal boxes that you put wood chips into? Do they really flavor the food or are they just kinda OK not really?I'm thinking I'm not getting much flavor out of my gas grill and I'm thinking of buying an old-fashioned charcoal BBQ.If I go for the charcoal BBQ, anybody bought natural briquets? Are they available on line only or do major stores have them? I've heard so much about toxinogens then and toxo that when you burn the regular ol' instant hot briquets.