The installation process is quite fast and simple to perform.
All my drivers, programs and games run without problems.
Win7 has risen in my opinion at speed, especially when copying data and opening applications is about.
When I compare the performance index between Vista and Win7, I come to an interesting result.
Under Vista I had 4.4 (Speichergeschw. Was the lowest) as total value (best 5, x), with Win7 5.6 (data transfer rate is the lowest). Best 7.0!
All in all I am very satisfied with Windows 7!
Whether a change is absolutely necessary ... that everyone should decide for yourself! :)
Best Regards!