We just had our boy done on Monday at 2 weeks of age. The method used is the one you were asking about, and it is done before they are 3 weeks old so no anisthetic is required. A nurse took Dylan away and bought him back 4 minutes later and he wasn't even upset - just hungry as you can't feed them before. The ring is still on there at the moment but will fall off in a couple of days and it doesn't bother him at all.

So - if you do decide to get it done, don't stress - your baby won't feel any pain and there is very little chance of any complications if it's done by an experienced practitioner.