The suction power is only good to remove money from your wallet
It sure sucks, and can leave red "hickey" spots wherever you use it but does absolutely nothing for insect bites for me and my kids.  Followed the directions but I think it really agitated it more and made it worse for my daughter. Also experimented with fresh bites using just an hour after the bite to bites that were 24 hours old, no difference for both. With no impact I tried upping the suction power to 4 or 5 pulls and left it on for a few minutes way over the recommended use, again, no difference.  Although I have some red marks from that.
Rating: 1 stars