There is a review of an acne treatment product called Dermology over at How To Acne Tips that gives a pretty good and honest rundown of this product and their risk free trial offer.
So often you will find some very tricky and confusing "free trial offers" for products and you end up getting whacked with credit card charges (and product) that you never figured you would have and then even more trouble trying to get your money back.
The company where you can buy Dermology is absolutely straightforward in how they have structured the offer. There does not seem to be any tricks here.
Check out the Dermology Acne Review and Trial Offer details.