I've talked with Leith before about SEO back when he was only accepting a few people per month. I wasn't able to make the cutoff date, so I ended up taking my services elsewhere. When Leith opened this service, I was thrilled. He's had some amazing reviews on BHW and this service overall has amazing reviews.
I purchased 3 months right when I got the invoice and we started from there. The first month was shaky as we focused on the domain - with little to no results. Month 2 and 3 we focused on the inner pages that are already in the top 10. It's been almost 4 months now of having this service, and unfortunately I haven't seen much change.
The customer service? Top notch. They're working on my keyword rankings for free until we see some decent changes in the SERPs. Though it's been nearly 4 months (1 free) of the service, and I haven't seen much change, I am confident that we will in the long run. I'm quite high in SERPs for most of my key words, but wanted to get the other ones in the top 3. I'm hoping within the next 4-5 months that we'll be able to do that.
Overall, the communication has been great. Whenever I want to contact them, I have a reply within 20-30 minutes pretty much any time of the day. His partner has been in charge of my campaign and he has explained what he was doing every step of the way. Now, we wait.