The single best part of using SheerSEO is how quickly it is to get started. You do not have to know a ton about SEO as the basics will do. You can go right to a page by page audit to see how your site pages are performing and what SEO changes you need to make. I did have an issue at the start and customer support got back to me within 4 hours via email which is outstanding.
SheerSEO can get a little pricey for the advaced features but I purchased mine through AppSumo which made it quite affordable. Review collected by and hosted on G2.com.
I had little insight to how each of my pages and my overall website was optimized for SEO. SheerSEO is taking the guesswork out of that and allowing me to start tracking organic search progress.
SheerSEO can compete with the "big boys" of SEO optimization.