This is a good start (assuming you can turn these animations off if you don't like them). Hopefully they'll bring back Aero Glass-style transparency soon.
There are also a lot more substantive flaws that need to be addressed. The Start menu (which is Win10's big selling point!) doesn't currently do DPI scaling properly. It's disappointing enough to see this flaw with third-party software, but for a core part of the OS, it's inexcusable. And there is still no way to remove the obtrusive Search and Task View icons from the taskbar. (Both of these issues have hundreds of votes on Feedback; hopefully they will be addressed.)
There are also a bunch of smaller annoyances – unlike in Win7, I can't get the useless "Homegroup" option to disappear from the left panel of File Explorer, even if I leave all homegroups completely. They also shove OneDrive down your throat. And if I rename "This PC" back to "My Computer", it displays under my preferred name in most places, but not in the tile half of the Start menu – it appears fine in the left-hand list portion, but the tile always says "This PC" no matter what it has been renamed to.
There are some encouraging signs, but this is definitely an alpha-class release in my experience. Glad I installed it in a VM.