For limited use they work good. On a single charge one of these listed below will cut up a tree fully about 10" at the trunk.
For a best buy get a Greenworks 80V Li-Ion Pro 18 in.
If you want the best get a Stihl MSA 200 C-BQ
There are a lot of less expensive ones, but like most everything you get what you pay for.
A lot of tricks to getting a gas chainsaw to start easy.
1. Never leave/store old gas in one, always startup pour the gas out and run dry, especially if it will be setting for a while.
2. Get a small one with a primer bulb and decompression valve which makes starting a lot easier if using for small jobs.
3. Only use pure gas as ethanol will shorter the life of any gas lines, rubber parts, diaphragms, needle tips in the carburetor and goes bad quicker.
4. Start the gas chainsaw about once a month as this is no more trouble than keep a battery charged.
5. After pulling the starter several times check the plug. If it is not wet not getting gas, if you smell and see to much gas maybe flooded.
6. This is what I use as I hate pulling recoils on saws, especially saws above 70ccs if they have been setting for a while. On most larger Stihls/ Husqvarnas it takes less than a minute to take the air filter off and spray in the carb.
Take the air filter off and spray a little in the carburetor or take the plug out and spray a little in the cylinder and if the saw is getting fire will start right up. This is Walmart's Super Tech Lubricant and it works great. Ether is not recommend to use as I know some will say they use it all the time.
I repaired/rebuilt 7 Stihl/Husky chainsaws last week (4 total rebuilds.) Saturday at what I thought would be an easy repair on my neighbors Stihl 036 didn't turn out that way. Done a pressure test and leaking at the PTO seal, when I pulled the seal the bearing was bad. So I have every part of the saw a part, case split, with the bearing pressed out waiting for one I order to come in and will replace both sides while a part.
Here is what I found after pulling the oil seal.
The top end is in great shape with 160 lbs compression.