This was a great purchase, since it saves me from buying a lot of batteries for my son's Leapster GS. It has a light when you plug it and my son was excited to know he "had electricity going into his Leapster." Good for on the go play and it is a great instruction tool to show my son how to conserve his batteries... since he used to leave it on even when he was not using it.
I have two pair of these (my son and daughter both have LeapPads) and they both love them. They are slightly big on my 4 year old, but fit my almost 6 year old perfectly. The only issue I have is that the ear pad falls off easily, but they go back on pretty easy. Overall I would say they were worth it! I love that they can wear these and I don't always have to hear two different games going on all at once.