Airsoft (with quality weapons, not the cheap junk) is incredibly fun to play "wargames" with. It beats the pants off paintball. I've got a gas blow back KSC M9 copy (which I got because it is nearly identical to my real Taurus 92, should be good practice) and it is very nice. Slide cycles with each shot, slide locks back on any empty mag, you drop the mag, slam another home and hit the slide release and continue shooting just like the real thing.
That said, the pistols are really only any good indoors. If you're playing outdoors, with people with AEG rifles you get outranged/outgunned. I barely ever use my pistol because of this, just carry it along in a drop leg holster for backup. Everyone else I play with (6 of us total) have rifles, one has 3 or 4 so I always borrow one of his. It is so much fun running through the woods with a Sig 550 or a MP5 or AK or whatever shooting at others. Mags and such function just just like the real thing, so reloads and stuff are good practice (you don't cycle the bolt on the electric guns though unfortunately). The realistic weapons thing just beats the crap outta playing paintball with goofy looking spaceguns with 200 rnd (or more) hoppers on every gun... I keep waiting for the cops to get called on us, lol. We're all wearing BDUs with LBVs with mags and stuff strapped all over us, with realistic looking Evil Black Rifles. LOL, talk about scaring your soccer mom-type people...
The AEGs shoot around 280fps stock, and can hurt/break the skin (really more like a blood blister type thing) should you can a good close range hit to bare skin. And you can upgrade them significantly. They'll tear up a coke can... I've actually had my thumbnail split down a bit (that hurt) from a solid close range hit, not to mention the slight broken skin/blood blister welts I got all up my forearm from 3 or 4 other hits from the same burst... Usually it is less painful than paintball, since the bbs are fairly light. Getting shot where clothed is not painful at all, just a quick sting. Every gun we play with is running up around 350fps and shoots real nice. Nice range, and nice accuracy. Killer fun. I also happen to be close to the airsoftatlanta.com storefront, so there is no shortage of people to play with should I choose to branch out of the group of friends I currently play with. Plus I get to handle all the cool equipment in store. I'm going to be picking up my own AEG here shortly, probably a AK or M4. It's just hard to justify sometimes since they run around $300, and mags are $20+. I can get another real AK for that, and 4 real mags for the price of one of these. But alas I can't run through the woods playing with my real stuff shooting at people, lol.