Don't baby your tools, use them as you would a gas tool. They should hold up just fine. If you have a problem, then the warranty is your best friend.
I don't believe in babying an expensive lawn tool, it kind of defeats the purpose, and doesn't really become a gas replacement.
I'm on year 3 with some of my tools and the only problem I've had was a defective battery which was promptly replaced. The other problem with my mower was my fault for thinking I could cut a tree stump with my mower :(. (ran over it by accident). I had to replace my own mower. No way should anyone try to say that is a warranty issue.
Power on, engage!
I always try to keep some perspective when reading on line product reviews. People who have negative experiences are so much more likely to report that it tends to skew reality a bit. The ratio of bad experiences reported to good ones reported tends to inaccurately represent the ratio of good to defective products.
Should you ever have an issue with an Ego tool, you can rest assured that they have one of the best customer support systems in the business.