My wife calls this watch Big Ben, OK I have slim wrists but it is larger than you think, however, after removing some links on the bracelet (relatively easy as they have screws) it fits very snugly and comfortably, only in extremis do the buttons stick into my arm. The compass has to be calibrated which is a bit of a pain and I haven't checked its accuracy yet but I have found it very useful for working out which way to go when I come out of a multi-exit tube station. The tide indicator is only as accurate as one of those tide clocks. The hands don't glow much unless you leave them under a spotlight but the push button lighting works OK. The fourth hand that indicates the compass/tide/temp can sometimes get in the way of the time but after a while you get used to that and if in doubt a quick read of the tide or temp moves it out of the way.