Ok, first time buying truffle oil. A friend cautioned against buying ones that are flavored with chemicals - though am not entirely certain how to do so. An initial read of ingredients at the 2 varieties at Giant Foods yesterday was inconclusive -- does "truffle essence" count as a real ingredient?

So, SE-ers, do you have any great recommendations for your favorite truffle oil (and where to buy it)? I have access to a Whole Foods, Trader Joes and the usual suspects: Safeway, Giant, etc. I don't want to spend a huge amount on this, but also want to get a medium sized bottle.

And, while we're at it - your favorite uses for truffle oil (aside from mac-and-cheese, and grilled cheese)

Many thanks!