Don't own one, but have been sniffing around the edges for a couple of years. I want one, but the Toro I have continues to be a decent mower. I mowed on saturday, and it started on the second pull.
My brother has an EGO mower, and loves it. I'm leaning that direction. I have had DeWalt, Milwaukee, Craftsman, and other cordless power tools, and they're all fine. I actually have a 40 Volt DeWalt weed wacker that I love.
But the EGO seems to be the way to go. Long battery life, quick recharge times, parts available, lots of other items that use the same batteries - the list goes on.
Jeff though, with Ace in Bismarck, said that they're getting out of the EGO line. Said that when a problem comes up, the mfr is hard to deal with on warranty issues.
So, I guess it's like anything else. When it runs like it should, everyone is happy.