So far five of my friends have upgraded their Macs to Lion.
Two are frustrated by problems caused by third party software they installed then forgot about.
One is frustrated because his Leopard -> Snow Leopard -> Lion upgraded Mac needed to have caches cleaned to operate smoothly.
The last two are working properly with no problems at all.
A casual survey of Windows users I know shows they stick with the Windows versions included with their PC or reload the PCs from scratch rather than doing an upgrade.
What does all this prove?
Nothing.
Burn a Lion install DVD and do a fresh install if your Mac is having problems. That will fix a lot of potential problems.
Two are frustrated by problems caused by third party software they installed then forgot about.
One is frustrated because his Leopard -> Snow Leopard -> Lion upgraded Mac needed to have caches cleaned to operate smoothly.
The last two are working properly with no problems at all.
A casual survey of Windows users I know shows they stick with the Windows versions included with their PC or reload the PCs from scratch rather than doing an upgrade.
What does all this prove?
Nothing.
Burn a Lion install DVD and do a fresh install if your Mac is having problems. That will fix a lot of potential problems.