Looking around the Internet AshTree, it seems plenty of people have problems with Apple products and updates. There will always be greater number of Windows users talking about difficulties simply because there are so many millions more of them. We most often only get to hear about the bad experiences anyway, not all the other cases where everything works fine.
I've been keeping up with using the Technical Previews of Windows 10. The later ones of these run pretty well but even after the final release, there will still be updates and fixes issued. This will go on for much longer than a year so if waiting for any or all bugs to be ironed out, it might be necessary to wait forever. Windows 7 is still receiving updates after all.
I will be upgrading as soon as the final release is available but it won't hurt if people want to wait a while. When deciding whether to jump or not, it isn't always possible to go purely by what others say. Some may never say anything good about Microsoft products no matter what. Some might experience problems that you won't.
Expect the Windows 10 download and upgrade to take a long time, it is big! When the Window 8/8.1 upgrades were released, I think some got into difficulties because they thought the download and upgrade process had hung. It just sat there doing apparently nothing for such a long time that the process was given up on and aborted by the user. Doing this is something that could cause problems and an eventual messy upgrade.
When upgrade time arrives, allow plenty of time and just leave it if the process appears to be doing nothing. There will be times when it appears to have stopped at say 3% or 35% but if left for long enough, the upgrade process will proceed. The disk activity light flashing can be a clue that the Windows 10 upgrade is working away in the background.