How many times do you look at your wrist on a day that starts early and has no clear finish? That is the sort of day Frontier is aimed at: leaving the house expecting to come back late, and not thinking about the watch until you need it.
If you are torn between two of them, write to us before you buy: there is a person at this end who knows the catalogue and will tell you what is known about each model and what is not. We prefer that to a choice that happens to come out right.