OpenTable is great. If you are looking for some decent reviews and quick reservations at a nice restauraunt, then I highly recommend you check it out. Like US Airways, I have used it many times, and unlike LCC, OPEN has almost always left me a satisfied customer.
I thought I had learned a lesson with the LCC coverage; that lesson being that if you know a company has a lot of customers and a growing business, you should cover them long even if you hate them with the intensity of a thousand supernovae. Hoping not to fall into the "fool me once...won't get fooled again" trap, I am going to get fooled again and cover OPEN short.
Why? It's a great site, but it's still just a restaurant site. There are plenty of alternatives -- Yelp and Foursquare just to name a couple big ones that offer advice but not reservations -- and ultimately I don't believe that taking kickbacks for replacing a 1-minute phone call can possibly be ALL that lucrative. (Yes, I realize they get money for selling my email address and "targeted marketing" as well.) However, a little over a year after their IPO, they are valued at nearly $1B, with a P/E of over 150!! Forward PE over 50 and otherwise fairly impressive financials, which suggests very healthy growth, but come on, $1B? Did we learn nothing from the dot-com bubble? Just my off-the-cuff opinion of course.