I've tried flukers, zoomed, stick on, analog... you name it. The one that I stick with now is Acurite. Of course, you can't beat a good temp gun for accuracy... but for constant temp reading the Acurites are reliable, accurate, and not too pricey!

Best to use are the three in one (in/out/humid) variety, but I also use a single unit with probe for cool side temps. I still have and use a few zoomed and fluker digitals, but those are mostly for backup, travel tubs, and room temps.