I wrote a review on this app long time ago. For those who want to read, just follow the
link.
However, I don's recommend anybody to use SEO tools.
Regarding WEB CEO:
1) On-site optimization is evaluated here, but it's not it's not useful at all. Of course, it analyses things like h1 tags, bold keywords, etc, etc, but I am not sure it helps. Honestly, man should await top positions after seeing reports and optimizing his/her site in order to meet criteria mentioned in this tool.
2) Friendls links. Well, I am not sure where it gets links information from, but you'll find out that many links don't offer any listing for other sites. Basically, links pages found by this tool are usually some "my favourites".
3) Keyword tool is completly useless. At least, it was when I used it about 1 year ago.
Etc, etc.
It has only one advantage.... Man can try all of those tools for free (if it's this way always).
But professional SEO shouldn't use this tool.... I don't use any such tool at all. Manual work does it better
.