The Stihl Gta40 is my new favourite toy.
I have been using it constantly on re-pollards, tight crowned reductions and fruit tree pruning.
The best part of it is the light weight combined with the narrow profile as it hangs on the harness, the small batteries provide a very well balanced machine.
Although it is intended to be used with both hands like any other top handle saw, it is really good for reaching out and cutting one handed.
The only negatives I have found are the low chain spread doesn’t deliver as neat a finishing cut as my Echo 2511 and it tends to judder a little when using the pushing chain to cut.
It’s purely a light pruning tool, if I want power I have petrol saws.