I love it. Installed it on two desktop pcs that had been running W8.1 and one old, underpowered netbook running W7.
No problems. I have still have my network, my wireless printer still works as does all my peripherals including my Network Access Storage Hard Drive. I can 'cast' anything on my devices to my smart tv using the built in tools in W10.
Much, much faster boot up times. PCs are not overheating and crashing. I had that problem in the hot weather last year but it is running cool.
Remember to right click on the Windows icon at the bottom left of the task bar - this gives access to many common tasks and many new users don't seem to know about it.