🌳 Arthur Segalas
Terrible to be honest. I don't use a lot of plugins, apart from an ad blocker, remembear and are.na, so no a dealbreaker for me. But if you use a laptop, try it for a week and you might be surprised by the amount of extra battery time you get compared to, say Google Chrome.
🧉 Martin
+1 for battery performance in Safari. Chrome was eating too much. Apparently they're going to dramatically improve that in macOS Chrome soon, though.