Not worth it!
It lures some bugs but we also used it without and got just a few less. So I do not recommend this.

must be old
we have owned our stinger for 2 years-this is the time we had refils that were not effective.

I really don't see it happening.
So I've stuck this thing to my zapper and have seen very minimal results. It's in a small area where there are a good bit of mosquitoes, but believe me they have more interest in ME than anything else. There most be something better out there.

only a 15% boost
Yeah you can tell it does attract the mosquitos...

And the boost in zapper kills you get from it versus its cost only justifies getting it IF the mosquito population is very very high. If its not, then don't waste your money on it.

Now what would be a better value is make one for 80 cents that only lasts three or four days. And make it a little stronger. The idea is to leave the bug zapper on for that entire time, and lure 75% of them into it. Ya know? Might be good for 12 days or so, before the population builds up again.

Anyway, its not very effective, and I'd only buy it again out of desparity.