I'm a VMware convert...

My work involves doing a lot of proof of concept work, as well as moving between various projects. Desktop virtualization is the key for me here. I use one virtual machine per project, and several for testing.

Until recently, I used Microsoft Virtual PC, but VMware won me over for a couple of reasons:

• The snapshot and cloning features.
• If your host PC have multi-core CPU, so can your virtual machines.
• Multi monitor support (yes, your virtual machines can run multi-montor).
• Better network features.
• Easy to convert my old VPC images. 
• It just seems to run better and to be a more mature product (no hard evidence here, just a gut feeling).

Converting my existing VPC's was a little tricky at first - you need to start them up in MS VPC and uninstall the Virtual Machine Additions and then shut down the guest OS. Secondly, VMware Converter (free) does a lot better conversion job than the converters build into VMware Player and VMware Workstation.

After converting I fired up each virtual machines in VMware workstation and installed VMware extensions on the guest os.

Now my virtual machines are running perfectly.