I think I have 5 right now...if possible go with a FXIII instead of a FX3, as the earlier ones have been more reliable, for me at least.

No issues early or late in the day. As long as there's legal light they've been fine for me. From dry deserts to wet Afognak Island and from 20 to 500 yards, they've served me well. For 200 yards and less you're golden.