Install went smooth, everything working fine. Gonna use Edge for a while. These days I only really use Edge and FF at home and Chrome at work (Win7 boxes). I used to run Opera, especially before they switched to Chromium. Not sure if Edge is ready for full-time use but it's working surprisingly well so far even with default settings.
There's a few big improvements to Edge. The big one: it blocks a lot of Flash content by default now. You can unblock Flash content on a per-site basis "Once" or "Always" if you need it. It's a couple of mouseclicks away with an icon in the upper right. You can still of course disable Flash altogether with a few clicks (advanced settings), but so far the default mode strikes a good balance. I'm running TH (almost left that as THG, old habits die hard) and AT with Adguard disabled, but I still enable Adguard for sites that are unknown to me, super abusive, or I otherwise don't trust.
They also added the ability to set tabs aside for later. This is obviously not a cutting-edge feature, but it's good to see it in the pack-in default browser. I won't fault them for adding useful features, even if they aren't the first to do so. I'll leave that to someone that still types M$ like it's cool 20 years later. The last major change to Edge I care about is the "show tab previews" arrow. It appears just to the right of the new tab button, and just like it says it shows a preview image of all current tabs. It's like mousing over the tab preview, but for all tabs at once. Also not revolutionary, but it's handy to have.
The rest of the changes probably won't affect me much personally, outside of Game Mode. But I figure Game Mode is going to see a lot of coverage so I'm not going to bother fiddling with it right now. Also it require game support, which hopefully we will see for more and more titles. I suspect it will primarily affect the number and severity of hiccups (minimum FPS) on humble spec'd PCs, but I don't think it will impact average/peak FPS much if any. At any rate, it's nice to see them doing something like this - it's a free boost for rigs with older/cheaper processors that don't have threads to spare. It's really good of them to offer, and if you don't want to use it, just ignore it. For those who absolutely do not want anything to do with it (even though it doesn't hurt anything by existing and you can safely ignore it), please just disable everything and don't rampage internet forums screaming about an optional feature. Thanks. I love you all.