All as gone well with my upgrade.
It seems like some of the early issues I had with the search bar not working properly, and the windows update feature stuck at an update, seems to have fixed itself.
One thing I have noticed is that when it comes to your pre-installed peripherals i.e. the ones I had before the win10 upgrade, seem to need a re-install. Win10 messed up my printer setup, putting 2 unknown devices in the device manager, while not recognising my printer at all. I had to re-download the installation package for the printer and manually delete the 2 unknown devices.
Also there seems to be still the bluetooth problem as well. So far no patch / update as appeared for that. Also I was talking to my girl the other night and she said her slingbox media player isn't working properly either. I checked on the website and a lot of people are having problems. But then a lot aren't either. So I'm not sure if Win10 is installing exactly the same on everyones PC.
I did notice the procedure to upgrade from W7 to W10, was slightly different to upgrading from W8.1 to W10 .. it seemed to take longer on the W8.1 OS.
Also I noticed I got my Windows start up sound back last night after yesterdays critical update.