I have Coralife, JBJ, and Zoomed. While I like the fact that the JBJ and Zoomed are small, in tank, and inconspicuous...after a few months, the calibration is horrendously off. Zoomed seems to lose suction fairly quickly, condensation on the screen, and the battery life sucks. JBJ, I thought was more accurate, however, the first one I got was great, but I dropped it and didn't get any new ones for a couple of years. I got 2 of the JBJs later on. One of them, after a few months is now 30F off while the other seems to be 5F-8F off. Apparently, one of my tanks is currently at 110F. My Coralife has been the longest lasting one. Not the most ascetically appealing to me as it has to be placed outside the tank with a wire probe that goes in the tank, but I do know of other members having calibration issues with this brand as well.
Moral of the story...Digitals aren't that great. They are pricey compared to non-digitals, batteries needs changing constantly, haven't seen replacement suction cups for sale, will probably needs to be replaced often, no way of adjusting calibration, but they just look nice.
