Yep, I turned on my laptop and there was a notice saying that the driver was ready for download. It took about 2 minutes to download and install.
I've tried it on several projects and it seems to be working fine.
I have used the UA25EX as a portable interface on my laptop for about 4 years now and I think it's working as well in Windows10 as it ever worked in Windows7. I'm very pleased that Roland has seen fit to release a driver for the UA25EX.
I have only performed the upgrade from Win7 to Win10, not a clean install, and I'm rather impressed by the stability and performance of Sonar so far. In fact in all my tests I have yet to find a project that has performed worse than before the upgrade.