Well, myself, my younger brother and few local 20-something guys have played a few times. I only have a gas blow back pistol though, and let me tell you the AEGs (automatic electric gun) are way better for playing outdoors.
The good quality guns are very, very nice. I've borrowed a Tokyo Mauri MP5 and Sig 550 to play with a few times. Very nice, WAYYY better than my gas pistol.
It beats the pants off paintball, because number one the guns are not goofy junk like paintball. They are realistic right down to the trademarks and such (covered over alot now for sale). Mag reloads are just like the real thing (standard mags hold a few more rounds than real life, around 50 for you average AEG, but it's close enough. My group has agreed to not use mega hi-cap trash at all.) Number two, because of your limited ammo, and reloads and such, people aim. Which is another part where the realistic guns come in. It is VERY sweet to be playing, getting into the game and have a very realistic looking/feeling/operating gun in your hands. Frantically swapping mags while you're pinned down and such. Very sweet. You just don't get that with paintball and it's 200+ round hoppers and such fake guns. Number three people playing tend to take it more seriously, none of this "Xtreme Sport" crap that paintball has kinda become. Airsoft is for people who want realism when they play wargames IMO. The rifles, especially with upgrades to increase velocity, are pretty accurate. My GBB pistol (a KSC M9 btw) is accurate but only at fairly short ranges. It is great for indoors, and is a good backup gun for outdoors, but to play outdoor games you really need a rifle.
I'm lucky enough to have a Airsoft retail store near me, www.airsoftatlanta.com so I've handled all the popular rifles (don't sell most of the rifles on their site for some reason???). They are very nice.
Now, the "springer" airsoft guns are junk, and are not to be played with in scrimages. This cheap stuff you see at most gun shows and for sale in tapco and cheaperthan dirt and such is only good for plinking, so don't think you're getting the real thing with those. You need a gas blow back pistol at least ($100-$150 for a decent one) or preferably a AEG ($250-$350ish) to play with.
Here's a few sites to buy from:
www.redwolfairsoft.com
www.precisionairsoft.com
www.747imports.com
www.airsoftatlanta.com (have the ICS Airsoft Elite MP5s for great prices, pretty nice guns, good first weapon)
For info/reviews and forums for starters:
www.airsoftplayers.net
www.airsoftzone.com
www.planetairsoft.net
squadx.ukairsoft.net
I'm sure you could have alot of mall ninja wannabes that could ruin it. For me and everyone I know it's just for fun, we don't think we're badasses because we play airsoft. Strictly for fun (and some practice I guess), but we all want the most realistic game you can get without actually getting killed... This is the best out there currently that's affordable IMHO.