I have been using my windows 7 laptop only for the last 6 days.

Win 7 pros –

• very stable
• Fast booting, shutting down.
• seems to run better than vista on the same laptop

Win7 Cons –

• some graphics issues, with screen redraws. It could just be an issue with this laptop(dell D630, Nvidia quadro NVS 135M)
• Issues with apps that minimize to the system tray. It takes an extra step to get to them.