I got Vmware Fusion 4 when I bought my MAC Book Pro ( core i7 2.0Ghz Quad Core 6MB Cache, 4GB RAM and 500GB HDD). I installed Win7 first on Vmware and then later WinXp. In both case the Virtual Machine was slow, it lagged and even the host OS LION, started to lag.
I assigned 1.5GB to 700++MB RAM and also gave upto 4 cores, but performance was slow. Did some research online and found that Parallels 7 is alternate to vmware. But is parallels 7 better in performance compared to vmware fusion 4?