We use
vBSEO on all of our sites.
The steps outlined on that site are all well and good and most of us could easily handle performing them.
What I like about
vBSEO is the support. Every time I've had an issue they have quickly helped me to resolve it even when it's me doing something stupid. This save countless hours searching for fixes and lets me concentrate on running my site, not looking for obscure issues.
Sitemaps - I'm sure there are other options for creating and submitting sitemaps to the major search engines. I know that
vBSEO Sitemaps work. They help to tell Google and the others I have a valid site out there that has constantly updated content. I see stuff from site show up in Google Alerts within hours of posting. I'd like to think that
vBSEO and their methods have helped get my site to the point that Google deems it a site to crawl often.
The people at
vBSEO also keep track of
SEO trends and distill a lot of the information out there. This helps me as a site owner as I don't need to become an
SEO expert tracking that stuff all the time.
Sure, all the stuff
vBSEO does can be done manually, but it is my opinion that for the cost there is value in turning this important aspect to the pros.
We like enough that we include
vBSEO rewrite rules in our documentation for our clients to use.
Hope that helps