It is not perfect, there are issue depending if you need 32 or64 bits or if you need .net4 or greater. Games work but I have issues running tools like mod managers, game save cleners that are made with .net . In my case Sims3 works fine but not the Sims3 Launcher(this tools has more features then just launching the game like importing custom content/mods )

Sadly some Java tools stopped working if you run latest Java runtime because for some reason some crap was removed from Java and nobody made some easy way to add them back with soem package install.