The watch has 4 function buttons - lap timing/stopwatch, alarm, backlight, mode, set time, time for 2nd time zone. For me this was a compromise to save a more expensive watch from being damaged on holiday. Ideally I would prefer something more petite but there does not appear to be anything available which is suitable for poolside diving (water resistance 100m). So far no problems. The watch is a bit thick but quite attractive. I think it may have to go to Limit whenever the time comes to replace a battery to ensure it remains waterproof, and if the strap needs replaced. I think it is good value at this price.