I upgraded my computer from Windows 8.1 to Windows 10 yesterday afternoon. I've experienced a couple of slowdown periods yesterday. Today, so far, no slow downs. I'm using the 'free' version of Google Fiber that gives me 5 mps (better than my Time Warner 1.5 mps).
It seems very similar to Windows 8.1, except the APP selections show up in the lower left box after clicking on the start button, and you can have multiple desktops, which I haven't tried yet.
There is no Guest account for visitors that just want to check their facebook pages, etc. They would need to either use your account, or setup their own account on your computer.
There is an option to switch to a local login (before Microsoft account access), if you choose, but you can't toggle back and forth, it's either one or the other.
