Just got done installing mine yesterday. I got the blue "prototype" version ($20 extra for blue), and damn it looks sharp! Very bright, fits like a glove, easy to set, truly spectacular!
I'm extremely satisfied with this unit. Today was the first time I drove since installing the clock, and I actually used it for once! It's awesome to finally have a clock with battery backup that's always reliable. No more checking my phone! It only has two wires, so it uses zero power when the key is off, even with the battery connected. Could not have asked for a better unit.
It doesn't come with a plug, so you have to splice the wires manually (use insulated plugs so you can disconnect it later if need be). I disconnected the rheostat and used a current tester to check when each wire got power, cross-referencing the car schematic for accuracy. The original clock has four wires as follows:
Black - Ground
Green - Keyed hot (gets power when key is turned to "accessory")
Red - Power from rheostat (left of the clock)
Purple - Always hot
This clock comes with two wires, black and red. I connected the blacks together and the car's green to the clock's red, and it works like a charm! The blue gives it that more modern touch, and really "pops" against the black interior. Cannot recommend this highly enough!