tedster - 5:16 pm on Sep 25, 2011 (gmt 0)
1. NAME - LINK
Majestic SEO - [majesticseo.com...]
Backlink data - refreshed
3. FREE or PAID
Free for your own website by posting a verification file. Graduated monthly payment scales, depending on volume of use.
4. WHAT I LIKE
This independent backlink data is the most complete available, IMO, and I have access to others. It's the only place I know of to access historical links (to June 2006) that have since been removed.
5. WHAT NEEDS IMPROVING
Until this past year, the user interface was a real puzzle. The power of the data was hidden from many who didn't want to climb the learning curve. Many recent interface improvements and new tools built on the crawl data have made it much better - but there's still a lot of room for improvement in their interface.