I did try it and have to say i kind of like it, some things will take a bit of time to get used to again like the charms bar is gone now on the right. Folder icons look different, and that new start/ metro combined thing looks very promising for me, can add all the programs to that if you want so the dekstop is nice and clean again. Most important: performance.... i did notice my cpu is around 3 degrees cooler with this windows 10 so thats a much welcomed improvement for me. for the rest it feels almost as rock solid as 8.1 to me
Driver wise i just used the ones i always use on 8.1 and all went flawless with installation. Now its time to wait untill there is a more "unlocked" version that shows the new OS inits true glory. lot of stuff is still disabled in the registry. some things can be enabled though if you look around for those regedit tweaks. The only thing not working is samsung m,agician rapidmode due to the fact that it doesnt recognise the OS yet. I didnt play any games yet but will test a few today perhaps .
All in all i like it and cannot wait till its released, the more cause my phone has windwos as well so when they both have 10 on it they will work together quite awesome for sure
Just be sure you dont use this yet as a daily OS cause you might run into issues every now and then (probably) for that wait till its RTM perhaps
here is the link if anyone wants to give it a go as well
http://windows.microsoft.com/en-us/windows/preview-isoforget the insider registration cause thats not really needed, except if you wanna upgrade your current win 8.1 to the TP windows 10