I've had a Garmin 45S for a couple of years. Generally no big problems with the running aspects of it, aside from its tendency to die during cold or wet long runs, which is mildly annoying. But I do think that some of its other features, particularly recording sleep (and sleep phases) and weird "body battery" readings, may be deteriorating a bit. Suggestions for a replacement? (Nothing ridiculously complicated; I don't use that many of its features.)