Help, too, is improved in this version. Fully searchable, and presented in a floating window like help files in other OS X programs, I found it well written and useful.
Macworld's buying advice
Parallels 7 is a fast, stable, and highly customizable way to run Windows on a Mac. Although its interface is focused on running Windows on the Mac, it also does well with other operating systems. There are minor issues with the built-in Windows purchasing and defaulting with Windows running as the Administrator, but neither of these are deal breakers. (If you use multiple Macs, you'll need to consider the cost of licensing Parallels for all your machines, too.)
If you're a current Parallels 6 user, upgrading to Parallels 7--especially if you're running Lion--should be on your to-do list. If you're new to the virtualization market, or contemplating switching from another program, you should download a free trial from Parallels and see how well it fits in your workflow.