SEO Quake

I was wondering what you all use for researching backlinks/ranking for competitor websites. I use SEO Quake (which I am sure you all know if free). Does SEO Quake lack anything that software such as Spyglass provide? Any experience/recommendations you all have with different software is appreciated.

Thanks

Try market samurai. It's pricey, but there are detailed instructions on how to crack it on here somewhere.