Link building competetive analysis

Hello

I wonder if anybody has experience of any of the competition link analysis tools such as the Trellian Link Intelligence or Keyword spy?

Basically I am looking for a tool to analyse what websites are referring most traffic to a competitor and what keywords are driving most traffic to a competitors site. The two above mentioned tools are supposed to do that, but I just wonder about their accuracy, if anybody has had any experience?

Any suggestions?

Thanks
D

I just subscribed to Keywordspy.com. For websites with high traffic like asos.com it seems to through some decent results but not for lower traffic sites. the position s and ranking of most of the keywords seem to be reasonably accurate although there are some paid keyword and organic searches that don't match the result as all.

Over all a useful tool I would say for research!

Any thoughts?

i used keyword discovery and manual checking on competitor. because more accurate more effective.. even it take so long.. and also i used IBP.