I bought a dozen or so for my fellow 81mm types a good decade ago, still going well, can still easily see the glow in the dark stuff. I don't really see the need to spend £ on the top end ones but I'm well satisfied with mine.
I've got the Code Blue as well. Been going fine for two years now, it started to lose time but I returned it and and it was repaired free of charge and returned by 1st Class recorded post within three working days. Very pleased.