I have used the 7 day trial. I didn't buy it afterwards. However I create the links SENuke creates manually. I've created an article spinner using their advice and I post my content on the sites SENuke does and it works great.
So in theory it should work great. However, I wouldn't spend the money on it. You can outsource the exact same job and get better results.
Well my maximum page rank was PR 3 so far and that was a make money online blog hosted on blogger but unfortunately Blogger deleted that blog because of promoting GPT sites.