Downloaded this today, as was curious to see what it's like. I haven't given it much time to give it any kind of thorough going over, but first impressions look good. It seems reasonably quick (uses same engine as Chrome from what I've heard). I think some people will like a lot of the customisable features available, plus the idea of stackable tabs seems like a 'crowd pleaser'. Nice to see most of my sites appear to be working fine on this (although again, haven't fully tested). Also, worth noting that it uses Bing as the default search engine, so if it 'takes off' may shift the boundaries from Google a bit. I'm very happy with Chrome - So will take a while before I would consider to switch to anything else for default use. (But initial thoughts are that it might be useful for development work). Much like most people I guess - Which must be a major problem for them, unless they have good partnerships & a decent strategy. So what do you think? Early days - But does Vivaldi have the potential to be a game changer?