I guess the only complaint I have is the orientation. The design appears to be for a left handed individual? Meaning one needs to hold it in their right hand to use and read and if they are to use the other hand at the same time it gets awkward if they are a righty.
My preference would be to hold it in my left hand, or have the probe swivel the 340 degrees and the read out flip so it can be read that way if needed.
So there's room for improvement.
Thermapens are awesome.... but I have the same issue with the "handedness" of them. A buddy of mine who runs a small food processing facility got me on to Thermoworks stuff a couple years ago... he once called them and asked them to make a mirror image one... I forget what their answer was but it obviously hasn't happened yet.
I'll plug one more thing from them... the mini Thermocouple... http://www.thermoworks.com/products/handheld/mtc.html
costs $43 and accepts any K-type probe. It's not quite as fast as the Thermapen but it works for my applications, and it's more versatile.
I got one of these and a 6ft heavy duty wire probe that I can snake into my mashing cooler and get constant temps... I also drape this around my whirlpool IC before adding wort to kettle for the boil, then during chilling I have realtime temp feedback. Real slick. Of course they sell a million other K-probes of which I have 3 or 4 more for use in cooking, etc.