Arrived on time. Set up in a spare "tester" bowl before using in with the fish. Like the digital readout and easy to use temp settings. Heated up the water relatively quickly, although it always read about two degrees off what my two probe thermometers were reading. Could have adjusted for that, but the unit would get up to the set temp, light turn green, go a few tenths (according to the readout) higher, and then stop heating. Red light would come on, display just dropped off a tenth of a degreSee full review