That Thermapen looks nice, but NINETY bucks for a meat thermometer seems... wow!
Sign up for their email list and they'll send you discounts for discontinued colors, sales, etc. I did that and I ended up with one that is kind of U.S. Army olive drab green, but I didn't care about the color. I think it was $20 off.
According to their site and several users on the board here the advantages are very fast readout and high accuracy in temperature readings. Admittedly a much less expensive thermometer would probably work just as well but I was following the bling.