Picked one up last night and dumped that piss down the drain, man I swear that's the worst miller I've ever smelled/tasted.
All you really have to do is break the tabs on the holder holding the co2 canister in and it works just like you would expect it. The only thing I think you have to be aware of is that when you pull the lever to dispense, pull it all the way and really fast. There's a bit of preload and if you half-ass it, you will definitely be spraying foam all over. Also the lever will click back into almost a lock position, even without putting the lock on. I've found if you just push it back all the way without it "clicking," you can leave it like that without a worry. It's nice to leave it in that position without trying to click it back and forth every time you want to pour one
I sanitized it and am going to fill it up with my beer for a bbq on saturday.