I checked the manufacture homepage and noticed that there are no drivers for Win 10 at the moment so I will wait for a while until drivers are ready for the latest Windows.
In some cases for older machines the manufacture don't provide drivers for Windows 10, on those cases if you are lucky Windows 10 + Windows Update have all the drivers you need and will install automatically if not you can install Windows 10 but not use all the features, some users have troubles finding drivers for graphic cards.
A pop up were shown from Windows that I can reserve the new version so I can install it at anytime. I decided to click on that to keep a reserve, later the windows update showed that it is controlling the requirements and soon later it started downloading it, which I cancelled as I want to wait.
I am using a different language (danish) of Windows, and I can see from the link you provided it is a tool to download, can I use this tool to download a different language version of Win 10? or is it possible to run the windows update to only download the installation file and not installing it? if so can you guide how to do it?
The reservation only make sense before the official release of Windows 10, now its offered by Windows Update and when all the files are on the HDD it will start nagging to install Windows 10. Some users report that it installed automatically! (not sure about this)
You can choose the language on the download tool and its IMHO a more controlled way to install Windows 10 because you can download the ISO and burn a DVD then you can start the upgrade by running the setup on the DVD when you want. You have until 29 August 2016 to upgrade for free.