Just noticed some of my competitors are using http://www.spyfu.com

Anyone else use to spy on their competitors? If so, what is primary benefit?

Seems like cost/month is hard to justify when there are so many different ways to monitor your own results as well as competitors.

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I use their FREE trail.
Their cost (the amount the user pays per month) estimate is alittle wide in variance it seems.
There are other such Tools as well that focus more on the Keywords, both PPC and Organic, and well as a monthly graph of activity.