This site does not seem as if it would add to anything you can get on Ancestry (as you already have it) or elsewhere.
It is just paying for research, and they do not really say who they are.
They are selling BMD certs for double the actual price - £14.95 !
It will not get you more info; use Ancestry to the utmost, and the IGI; when you need Parish Records, there are many available free, or you can ask on here. or join a Family History Society for your area.
Or do it yourself, which is half the fun.