In other words, this site is pretty safe...
What are the differences between the virtualization solutions? ( VMWare vs Parallels vs VirtualBox )
Virtualization is very personal. Each solution has its own pro and cons. So depending on what is your usage you may want to plead for your favorite.
VirtualBox The main advantage of this solution is that it is free. Now as much as free is good, there is a serious lack of drivers in this solution. It is ok to use it for the basic (like browsing the web) but if you need usb connection or drivers you may want to look at something else.
Parallels Desktop Parallels is an amazing solution. They were the first company to make a virtualization solution that target mac users, and there is nothing bad to say about it. It is super fast and very pleasant to use. Some users reported a lack of driver support.
VMWare Fusion VMWare is for professionals. It has all the features you would expect and since they have been providing a virtualization software for years on PC, their engine is very complete with all the driver supports. It is not as sexy as Parallels but much stronger.