I am a linux user who loves VMware ESX. Working in a Windows environment at my job this linux user needs to sometimes rely on Windows applications (Visio, vi client, etc). I have tried Wine but it doesn’t cut it for me so I saught out a good virtual desktop application. VirtualBox was my first to install from Sun which is open source and free.
VirtualBox was easy to install and use having worked with Vmware Workstation, ESX Server, GSX Server, etc. Windows XP and Vista installed as it should without a hitch and I was on my way to using those needed Windows applications. After time went by I wondered if VMware Workstation 6.5 would fair better than VirtualBox so I installed it on my Fedora 9 laptop (HP n6400 with 4gb ram). Right away my experience was plagued with performance issues. My cpu would spike to 100% utilization right away on the host after Windows guest would bootup for XP and/or Vista. This rendered my laptop useless until I could kill the running vm guest.
I soon updated to VMware Workstation 6.5.1 with the same cpu performance issues and even tried it all again after upgrading to Fedora 10 with no luck. So, after lots of wasted time I uninstalled VMware Workstation and I now just use VirutalBox. I was very disappointed that VMware let me down this time.