I have tested the clock extensively and send them back now, because although the inverted display is a great design feature, but when it comes to readability performs poorly. One must already look in the penumbra twice or equal to switch on the lights. Everyone should previously test times and then make a decision for themselves. With me at the end, only the outer cool look is simply left as an advantage - not enough to output 110. Incidentally, the opinions regarding the product images here seem to columns. In my opinion, the display is shown here a lot better, and white contrast as it is. So I would rather be the variant with normal display rate, if it must be a 7900. I have to decide in the end for 7710 because my functions as an athlete just more promises.
