I've had a Surface Pro 4 for work for a couple of months and in general it
is a fantastic device. I would agree about battery life, it's not an
all-day machine unless you are very careful. I have had some problems with
sleeping and hibernation but overall I'm happy.

It's pretty pricey though; I think if I were looking at something to take
to the airfield, I'd consider a Surface 3 although it has a bit less oomph.
Longer battery life, no fan to clog with mud, full Windows, quite a bit
cheaper.

All the Surface tablets have MicroSD slots, which is handy for some
loggers.