(Gone back to W10!)
Update. Installed W11 a few days back and to be honest couldn't see a great deal of difference apart from cosmetics, desktop functions altered around etc etc. I know from the Microsoft blurb it has all sort of advanced apps and bells & whistles, but generally not the sort of things I would use anyway in all probability. My machine was ok for this upgrade (minimum 4GB memory) according to MS.
I just found it slowed everything down chronically to the point where my reasonable-spec HP laptop (2 yrs old) was unusable. It would regularly just go into 'sulk' mode and examining Task Manager whenever this happened the CPU was really high, disk often up to 100% and memory 80% plus, and stop like that for ages. Several times I couldn't even access the 'start' menu to reboot the damn thing.
OK, I could have possibly tweaked things a bit I suppose, even put more RAM in – but why should I spend another £50 to get a machine that works as good as with the old OS? I know it will become unsupported in time but by then I'll probably be in the market for new hardware anyway. I have now rolled back to W10 (quite trouble-free and quick) and everything I want is running great!
Obviously my experience may be very different to others out there as H/W varies enormously, as do individual's needs and expectations.
Regards Mike