I recently purchased a bottle of Four Roses Single Barrel and liked it... a lot.
I ordered a glass at a hotel lobby bar last weekend and wasn't so impressed. It was good, but not in the same ballpark.
Stopped by a liquor store that had two bottles on the shelf with different barrel numbers, then went back to where I originally bought it and they had 6 bottles, all with different barrel numbers. I'm guessing they mix them up before they ever leave the distillery? Was going to post the bottle number up here, but I peeled the barrel number off and put it somewhere so I wouldn't loose it, and of course have. Ah well, no reason to be attached to it.