Any tradeoffs or cautions in using virtualenv?

[python at bdurham.com]

We're thinking about using virtualenv to isolate our development
enivronments.

Are there any tradeoffs or cautions we should consider before
going this route?

Are there other alternatives to virtualenv that we should
consider?

We are using Python 2.7 (32-bit) on Windows 7 Professional and
Windows Server 2008.

Malcolm
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