This is the bee's knees !
After years of risking my own limbs teetering on a ladder trying to prune an especially annoying massive chestnut tree, I finally saw the light and decided to buy a telescopic tree pruner. As usual, before deciding on a particular model I read reviews of many of them before plumping for this one from Spear & Jackson, which had far and away better reviews, and am so glad I did. The pruning action is very smooth ... simply hang the top edge of the pruner on a limb and pull the cord to bring up the slicing blade (with not much effort) and whoosh, the limb is sliced through and down it comes! When the pole is fully extended there's a very slight and understandable wobble due to the weight of the pruner above, but that's only when the pole is held at an angle rather than perfectly vertical; it just takes a bit of getting used to and doesn't detract from the efficiency of the pruner one bit.
I haven't tried using the saw attachment yet, which will be needed for limbs more than 1" in diameter, but am hugely impressed with the pruner element. The tool is simple to use, the blade is very sharp, and I would recommend this pruner to anyone. AND it comes with a 10 year warranty. My only regret is that I didn't buy this years ago.
By the way, I'm a woman and well past the first flush of youth.