On Tinker I found the controls to be a bit confusing, you like have to rotate him with the arrow keys then press up to make him move, I kept pressing the direction I wanted him to move and he just started swivelling around. I got bored of it after the first level, didn’t really interest me at all.
The quality of the new DremeScenes compared to the other included with vista are pretty poor, they're compressed quite bad which you notice a lot when they're animating.
See this screenshot:
The new content donesn’t really bother me much but it is nice to finally see some more ultimate extras! I’m hoping for something useful like concurrent sessions for remote desktop, however I don’t think that’s going to happen in a non server version of Windows. (It’s possible in XP with a simple DLL modification.)
You shouldn’t need to re start to install them, I didn’t need to.