I have the ts161, we refer to it as baby electric, it's pretty good for the most part weighs about as much as my 193 or 201tc with the midsized battery in it but takes a lot less energy to use when you're making a lot of smaller cuts and speeds up the rate you can easily work at. It's not perfect the safety button is super annoying and can actually start to hurt after a bit (hours) in the tree the balance feels really far back which some people don't like but it doesn't bother me I feel there's very little chance of bad kick back with the tiny chain it runs. The chain is an odd number of links is 65 drive links on a 64dl bar.
You can make a lot of smaller cuts like 4" or so on a charge, I did a fir that broke off about 120 ft up years ago this summer my battery already had a decent number of cuts but was still showing 4 bars when I started I made it all the way to the top on that battery and came up 4 limbs short. For the most part I'm happy with it out won't replace my 201 for everything but it's really nice to have when there's a lot of smaller cuts I don't mind doing 10" or even a little bigger limbs or tops with it depending on the situation, it's great for brush and it's super handy as a chipper saw to cut up those odd limbs that just don't want to go through.