I just have just one, a super accurate black one. I rarely use my nu-temps probes now since I purchased it.
It's not an easy purchase to make but worth every penny to have that kind of accuracy and quick reading at hand. I plan to buy a backup at some point.
Horizon Patriot grill, Kuma Platinum SE, UDS, Weber Spirit E-310, Mak 1-star (on the way)