Macworld has published a review of Parallels Desktop for Mac, including benchmarking it using applications (including Photoshop) both within a Windows Virtual Machine, as well as using Apple’s Boot Camp with Windows, and running natively under Windows on various name-brand PCs (Dell, HP, etc.). They bring up what everybody else is saying, that you’ll need lots of RAM to run virtualization software.
Parallelsâ€™ ability to run nearly every version of Windows, along with many versions of Unix and Linux, makes it a valuable tool for anyone using an Intel-based Mac who has a need or desire to work with other operating systems. If your job requires Windows, but you love your Mac and OS X, Parallels will truly give you the best of both worlds. If you put your Parallels session in full screen mode, anyone walking by wonâ€™t even be able to tell that under the Windows faÃ§ade, youâ€™re actually running the worldâ€™s greatest operating system.