Polesaw: electric v. gas? battery v. corded?
Most essential is keep the chain lubricated and sharpened.  I only fill mine with half a tank of gas because my experience it'll run out of chain lube before gas.  So do it everytime you add gas - a lot more often if it's electric! 

A gas saw will be fussy and high maintenance.  A battery electric won't have a whole lot of guts.  A corded electric will be fairly strong if you can get power out to it. Those cheapie orange extension cords don't really cut it.

A stupid person can seriously damage a pole saw, notably by damaging the pole and shaft running up the pole.  An electric that puts the motor out on the pole is unwieldy but relieves that issue.  

I'm taking note that you're buying this tool for someone else to use; clearly not a professional since those guys bring their own tools.  A homeowner must pay to fix his tool; a professional also loses revenue and reputation when he can't do a job because of bad tools.  Those non-professionals can be hard on tools because they don't have any personal stake in them.  

Needless to say, professionals don't buy tools at Home Depot.  If you want the Bridgeport/Monarch/Sony/Apple/3M of chainsaws, that's arguably Stihl.