I have an RAF issue one (marketed as the Seiko military). It is comfortable (once you've changed the strap) utterly accurate and infallibly reliable but...
(1) What f*(& use is a 30 minute only stopwatch
(2) It won't let me reset the seconds.
Me old chum Magnus who flies Gripens has a Breitling that he says is wonderful, but he didn't have to pay for it!
G