As with all EGO products, this one fills the bill. A lot of experience with EGO and never disappointed.My order was lost, I reported it to AMAZON. They sent out a replacement immediately.

I have the 16 and 20 inch Ego chainsaws. The 20 is much more powerful and has a more aggressive chain. I was very surprised. The 20 does plunge cuts easily when I take down leaning trees. 16 is for limping and 20 is for felling. Great combo for the farm/ranch.

I have both! The 5000 and the 2000. You wouldn't think the slight weight difference would be noticeable; but it is!
The 2000 is easier to 'throw around'; moving from cut to cut.
I probably shouldn't be writing a review yet; as these are just first impressions; after having used the 5000 for a while.
Like I said in the title; it's like cutting air. I was just getting started, or so I thought; on a 12" piece of Locust. Before I could get comfortable the saw was through the wood!
As for runtime and/or overheating; I can't speak to that; not having used it enough yet. But so far; I really like it; and I would buy it again.