Despite thinking that it's overpriced, I'm going to defend Nandos a little bit here.
Maybe it's just the Nandos in Hatfield being alright (that and Hatfield House would be the only things in Hatfield being "alright"), but the place really isn't half as bad as some people here are making it out to be.
Sure, you have to get up and order your own food, but don't you do this at some other restaurants and buffets anyway? Nandos isn't claiming to be a fine dining experience, and on the couple of times I've been to Nandos queueing has never taken more than 5 minutes anyway. Someone then brings the food to your table as well, so there's no waiting around standing up!
Generally, the food is good (although nothing to orgasm over like a few people I know would), if a bit dear, and well worth a try if you've never been before!
Unless you have a decent grill, you probably won't be able to fully recreate their chicken either!