The pieces are extremely light, dude. A couple of grams -- shoot, even a couple ounces -- will not make an appreciable difference, in my humble opinion. Your body will adjust to the presence of the piece, and you'll cease to think about it at some point. At least in terms of your daily activities. You'll obviously be aware of it for purposes of debonding and cleaning, and to that extent you would be just as aware of a piece that weighed a half a gram as you would one weighing a couple ounces. In that regard, you'll always be aware that something is up there, but neither will weigh you down or otherwise inconvenience you.

Incidentally, regardless of what the retailer in question says, anything as light as he's advertising absolutely cannot have much durability. As a general rule, lighter equals less durable. I come to that conclusion both through common sense and experience. One last thing: many of us were once the victims of a slick sales job like the one the retailer in question is trying to lay down. We're here because we got wise and found a better way. My advice: Run far, far away.