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I take it off the charger around 6:30 a.m. and by 11:00 p.m.--when I put it back on the charger--the watch has around 30% battery remaining.
My experience is similar. I take it off of the charger at 6am. By 930 it's approx 50-55%. By 1130 it's approx 30%. I have it on max brightness and haptic feedback. I receive a lot of notifications per day and wear it while exercising for about 45-60 minutes per day. I'm very pleased.
I can go 2 days without a charge on mine.