Newbie throwing in a comment here, but if you're smoking meaty things like chicken or duck breasts, they're fantastic if you can get them vacuum packed and then cook the vacuum pack at a relatively low temp for a long time (Heston Blumenthal's sous vide method). As long as you can get the vacuum packing done, all you need is a large saucepan and a thermometer - cook at 60C for several hours (overnight for preference) and then leave to cool & bung in the fridge. The vac pac retains all those scrumptious juices and it should keep for a few weeks. I had some smoked duck breast done that way (they'd also put herbs & seasoning in, a little anise, I think) and it was very good.
Hubby will kill me if I build one of these in addition to all the brew kit I've just bought!