I've had the b700, auto focus is just to slow, you have to start out at say 14mm and slowly zoom out, and wait till the auto focus caches up.
You can take pictures birds/wildlife, what I did is put bird seed down, focused on 1 spot, wait for the bird to land and take the picture.
You can get planes, but again start out at 14mm and slowly zoom out, again wait for the focus to catch up.
Good for moon shots, but again slowly zoom out
Not worth the money, unless you could get one secondhand for £50, would not pay any more.