Smaller places, or places you dont want to get done all at once, I'm sure it's fine. The battery technology has really improved.
Mom just got a new Stihl, I'll be reporting on that soon. Haven't made my mind up yet on a couple of things.
I've been thinking about one of these and the reviews look favorable:
The new nicad batteries from Sears, I have not been impressed with. Run time is OK, but life has been bad.
They are going with all lithium ion stuff (even have 2 grades of that now) and I would suggest you price a replacement battery and different charger because in about a year and a half, you will need to do that IMHO.
Normally, You would need to buy a kit to even begin to make it worth while... But they don't have a li ion kit with the big battery and charger.