Right, I've received my pack today.
The articles are awesome quality - they clearly aren't just written as quickly as possible... clear care has been taken over them.
I actually used this service to strengthen the "branding" of my site, to counter some slightly more dubious links that I'll be building in the future as a safety measure, so I'm not going to comment on the effect on rankings, but certainly I think it will provide a decent boost. The anchor texts I used were all "mydomain",
http://www.mydomain.com, and a couple of variants and one or two "click here" links. Their author even contacted me because he wasn't quite sure which keyword I'd like the articles based on because my brand makes it a bit hard to know, so they've clearly got good attention to detail. They even wrote some of the articles about my brand itself, proving they had to research before writing.
I asked to have the blog comments directed to the web 2.0s themselves rather than my money site just because I don't like linking irrelevant pages to my money site, and this request was followed very accurately.
All tiers were completed accurately and on time with their drip feeding over 5 days.
The video is awesome - 2 minutes long, even has our logo across the top right corner with our URL, and then relevant images and text so it is totally customised.
Basically, this is a fab whitehat service, and one you can really "feel" that they've gone the extra mile... A human reviewing this wouldn't label it as spammy. I'm going to continue to build links and add unique articles to these properties created to go for other sites we have in the niche or internal pages.