I've never used them, nor have I read much on them but in regards to the content: Isn't it a mix of the normal serms? nolva/clomid and whatever else? If so I can't see why it wouldn't work as long as you dose correctly and it's a trusted source.
I would be concerned with not being able to control how much of each I'm getting. For example clomid made me insanely nauseated, so it was nice being able to lower my dose. Not sure how you would be able to accomplish that sort of thing if everything is mixed in one capsule.