Frankly, I don't care about how Windows performs. I'll maybe keep a Windows VM around but I don't think I'll boot it up much.
However, I code Java webapps for Linux servers. Although the webapps work on Macs and Windows, I have to build an rpm for our ops guys to install the app. So that means I need a Red Hat/Fedora Linux install.
Originally I set up my Dell laptop (2.26GHz Pentium-M) for dual boot into Linux, but this turned out to a pain since I still needed some things that Windows or Mac OS X provide that Linux doesn't (e.g. Office, or use of Outlook/Entourage for mail). So I now have a VMWare workstation running Fedora Core 3 on my laptop and another one in Parallels on my iMac.
To build the rpm takes 1m 10s in the Linux VM. This is fine since I don't build it that often, usually just to test a bug fix. But with Parallels on the Mac, it takes 15s, ie. 4-5 times faster.
Now, there are plenty of reasons why that is - e.g. no virtualization on the Pentium M, and it's single core, but 4x faster is seriously impressive, even if there's no complete USB support.
By the way Linux on Parallels on the Dell was at about the same performance as VMWare.
I haven't yet preordered Parallels. I still have some vague concerns about how stable it is and about what they do with kernel extensions. I haven't had any serious issues since beta2 (with the two kernel panics) but with beta5, I had two unexplained system restarts overnight (ie. the iMac may have restarted on waking from sleep) after running Parallels. On the other hand, we've had several powercuts over the past month so it might be PG&E screwing up again.
I'm interested to see how VMWare compete ... will they sacrifice performance for stability? Will they continue to charge 4 times as much?
All I have to do now is to persuade my boss to get me a MBP ... it would be cheaper after all than this Dell even now (when I checked last week, it was $2600 configured to the same specs as the one I have now)
Edit:
MacRumorUser said:
Poor networking support, could never get wifi to work even following their own solution, no usb support, no sound, very poor graphics peformance, it felt sluggish and no where near as fast as that video, CD support was ropey
Did you install Parallels Tools? That improves the feel of the app in Windows. Also, I find the mouse tends to "stutter", which I fixed by:
1. Right click on the Windows desktop.
2. Select Properties/Settings/Advanced/Troubleshoot
3. Move the slider one notch to the left.