Here is my one month review as promised:
I bought the lemon plan with the full understanding that my niche and keywords will eventually need a bigger plan to get on the first page of big G.
A couple weeks after I bought my lemon plan, my site lost ALL of it's pre-SeoShark rankings after an apparent algorithm change by Big G, so I talked to Cecilia on Skype and she suggested some things I could do to perhaps get my rankings back.
Just a few days after I did those things, my site was again showing up for rankings for many keywords. Several of the 15 keywords I used in the SEO Shark campaign showed improvement. One keyword went from not ranking at all to being at position 35 as of today. Another went from position 174 to now position 75.
Now that I have tested this service, I know that I can rank for all of my keywords with a bigger monthly plan and more time. I will be back with another order as soon as I can afford to do that. I have 80+ keywords I want to rank for.
I recommend this service, but you have to do good keyword research to find low competition keywords (Don't just guess!) or ask Cecilia for guidance. Have realistic expectations. Unless your keywords have really weak sites ranking for them, a Lemon plan is not going to be enough to get you where you need to be.
Do a search and look at the sites that are already ranking in the top ten for your keywords. If those pages have a better page rank, SEO, traffic, content and appearance than yours and are established authority sites with aged domains, you aren't going to beat them without a monthly plan and good on-page SEO.
On the other hand, if all the sites ranking in the top ten for your keywords are all yahoo answers pages, youtube videos, random blogspot sites or low quality web pages that are not SEO optimized or are loaded with duplicate content, then you have a good chance of beating them very easily.