Performance has been better than 8, the layout is awesome, start menu is back (and IMO improved), modern UI improvements, really good computer wide search built into the task bar, built in modern apps are well made and simple, but also not required by any means and not obtrusive.
Overall, I can do what I want with it, it runs well, looks great, and I really have no complaints. Not sure what more I could ask for in an OS.
Be careful, if you're too well written or approve of the product too much someone will accuse you of being a PR rep. Better say something bad about W10 before somebody sees.