Well i wanted a lightweight, somewhat cheap watch for casual everyday use & after looking at hundreds of watches went with two of these Puma's, one blue the other green...i wanted a watch with a big face & an easy/quick to read digital display, And i got what i was looking for as this watch fits the bill. At 1st i was a little put off by the thin band ....but it works....the watch looks & wears good....ALTHOUGH...in the light of a real day....it just does not pop with quite the same intensity of color seen in the advertising pic. Those two things are the only things that detract from it so i knocked off one star for that. These are pretty good looking fun watches for casual everyday wear....at a reasonable price. Set up is a breeze, i did not even bother to look at the manual. Just do what comes natural. The night light is an aquamarine blue/green & stays on for about 3 seconds. there is a small & subtle difference between the blue & green watches....and that is that the green one has green colored buttons to match the green face, but the blue watch has black buttons that do not match the face. Both have time am/pm day & date, as well as a seconds display, and a timer mode. it may have other functions i am not aware of. The lens is plastic, not glass & will scratch easily. The watch also has a dual watch band retainer, which is nice. Yes, this is an easy wear watch that you could easily forget you have on. So to sum it up, i really like these watches & i was also pleased with the price.