Faucet spout perlator: worth it? [solved]
I've seen the following perlator and similars (also plastic ones) on some shopping sites. They claim it can decrease water consumption up to 40%. Is it possible? Is it worth to try?

If you are filling a pot, or your sink, it will take the same amount of water anyway. It will reduce the amount of water you use when washing your hands, or rinsing dishes. - Brad Gilbert 12 years ago
I've had a couple of these over the years and found that their biggest benefit was the ability to convert to a spray for better rinsing of dishes if your sink doesn't have a separate sprayer, not so much their water-saving ability. Even though a 40% reduction sounds like a lot, your kitchen sink doesn't use that much water to begin with compared to, say, your shower or clothes washer. So reducing your kitchen sink usage by 40% may not produce noticeable results on your water bill.
I'd echo what Mike said. We have one like this, mainly because we don't have a spray head. This is a cheap and simple way to add a spray head. That it may save some water is a bonus. - user558 12 years ago
Replacment of Recessed Neoperl Faucet Areators