That looks like a fairly sweet deal if they stand behind their lifetime replacement on the probes. The unit itself has a 2-year warranty. It seems to have several positive reviews from verified purchases.
Be careful though. I don't know if you noticed, but while they advertise a rating of 716° F for the "Teflon core" of the probes, the silicon handle is only rated for 482° F. So it states, "WARNING: Please DO NOT leave probes in oven when temperature is set to above 482°F."