For somebody who knows nothing about the product you come with a lot of negative baggage. First - a lot of the problems are because Windows is crap. Next, it is providing a virtual envrionment for Windows, and a lot of Windows people can barely keep their crap running in real hardware. Now we get to the heart of it. OS X is also running and it thinks it should have a shot at some of the hardware that Windows is trying to use. Add to that users who can barely run a Mac without extensive hand holding who are also trying to run Windows concurrently, and you have a major blame game going on. Parallels is solid but you do have to think, and the more you understand how the hardware and the various OS's interact the fewer the problems you're going to have.
I've been running Parallels on my 15" MacBook Pro since the first round of beta's, and also on my Mac Mini. I've never had any of the problems so many others have had. All my peripherals work as expected in Windows XP, Linux, and OS X. Even my wife, hardly a guru leve user, has had nothing but praise for this new platform with Parallels. She hasn't turned on her Wintel system in months and doesn't need it or miss it.
I'm Parallel's happiest customer and you couldn't take this away from me for anything. I'm now running the most powerful workstations I've ever owned and I couldn't be more happy. My wife is now using OS X and still has access to Quick Books Pro without the hell of running on a Windows workstation. I made a master of the Windows VM - if there's ever a problem with spyware or viruses, or even a hint, I delete the current running copy and make a new running copy from the master. All data is stored in a Mac file system shared out to Windows, so Windows and all the applications are a nuisance commodity that can be blown away are replicated from the master in just minutes. No more Ghost, no more PC Tools, no more Partition Magic, no nuttin'.
I'm a Unix SA by trade and I absolutely require performance and reliabilty at work, at home, and on the road. I need things to work every time I use them, and for the first time in my life I have that in a machine I can throw in the tourpak of my Harley and know that at the next wifi-restaurant I'll be able to log in via the VPN, check my systems, read my mail, work interactively via both Windows tools and Mac tools and terminal sessions via ssh, and still have Streets and Trips open to see where the next gas stop is going to be.
dp