It is a blast, especially in groups. This really is for adults as well as kids, and if you get a group of people together to do this, you will have a blast.
These taggers (guns) have a range of about 350-400 feet, maybe further (maybe a bit less in bright sun).
They have several features to enhance the playability. This can help balance some scenarios where differences in numbers or age/experience might make things unfair.
Price Guide: $50-$60
There is already a shotgun attachment developed, as well as a green dot site. These slide on to connectors on the tagger to give additional capabilities. There are also rumors of more weapon attachments in the pipeline. Depending on your gameplay style, you can get as much exercise out of it as you want. The range on these guns is hundreds of feet (a bit less in full sunlight), so you can easily get winded running around inside the playable area.
It teaches basic strategy, tactics, and teamwork, and even the younger kids are starting to pick up some of these concepts. The taggers (guns) are very rugged - if you compare the cost of the system with a commercial lazer tag rental facility- you will make your money back in a couple of sessions of playing, and these taggers last a long time.
Very active online community (there's several newsgroups including an active one on Yahoo, search for 'Lazer Tag Team Ops'). The user community and the available technical information on the web opens the door for tech-minded to tear them down and 'mod' them to give them additional features.
Nerf Lazer Tag System - 2 Player