Product review (5 stars): Great Product
The KRS-2100 is great for the money.  It fits 2 - 1/6 kegs (you will need to add another faucet) or a full size keg (1/2 barrel) or a pony keg.  You get a 2.5 lb co2 tank, a little small, but it's lasted for 3 kegs.  You can buy a 5 lb co2 tank for ~ $65 delivered, and it's nice to have a backup, but you don't need to.