On the surface Opera GX looks and sounds like a cool alternative to whatever you're using now but in reality it falls very short if you're more then just an average PC user.
1.Search bar suggestions still persist even with the appropriate setting disabled or with history deleted!
2.The built in ad block automatically has things like google as an exception but even with them removed you still get a glimpse at the ad before it covers it up client side, very sleazy move.
3.Some of my bookmarks like youtube simply don't have a logo?!
4.Lack of customizability to the bookmark/extension/search bar at the top. In firefox you can drag and drop pretty much anything.
5.Disabling the side bar leaves you with "menu" next to the opera logo making it look cluttered.
Overall rating: 3/10, nothing more then eye candy with some features for people who don't fully understand how you use a PC fully. If forced I would rather use Edge than this.