i'm using Paralles V3 for quite some time and was eager to test the new version. I've tried the the new version the entire morning and my enthusiasm slowly fades away. The main reason i have Paralles, is to play some games in windows and that's not possible in v4. Every time i start a game, windows chrash completely. In V3 the games run all perfectly. I think after the trial period i go back to v3 and let parallels time to fix one ore two things.