Crothian said:
yes, the guidelines do say that and after I wrote a bunch of reviews I found out what worked for me.
Regardless of intention or need, this still strikes me as a bit sloppy (if not shady - and I am not saying that it is, only that it can be taken that way). No offense meant, but what do we have to go on other than your word. This is the kind of thing that I see in other places as well, like finding an error that you made and then fixing it without documenting or telling anyone.
It may not matter to you if you received the product for free or purchased it, but it does to me. I am going to adjust my opinion of the review based on the facts that I have available to me, and by omitting facts you are limiting the information that I have to work with.
I have seen people omit facts for good reasons and for bad reasons, but I want to be able to judge for myself if the fact is important. When you do reviews, you are in essence, a member of the media. When you leave out or distort facts, it makes me think that you have an agenda.
Basically, if you hadn't admitted to this I would never have known. Had I found out later from someone else, I would have probably went into each and every review a bit more dubious (or just skipped your reviews).
Giving us all of the facts will not hurt the review, will not hurt the product and will not hurt your reputation. The quality of the review and the usefulness that I gain from it will speak for your ability.