Now maybe I am not one to talk, but then again I always say to much.  Maybe now is time to ask the question to you all.

Recently I did the two previews one for Darksiders and MUA 2.  How ever this got me thinking can one really do a good preview with out ever playing the game?  Yes I have see many game play videos and loads of information for each.  When I think about it more my gut tells me that it is wrong to write them.  As a reader I like to hear from people who have played the game.  So does one's knowledge about the product threw others and the facts they know good enough for a preview? 
That is my question is a preview good enough for you even though the person has yet to play the game?  Also does it have to be noted that they have yet to play the game, but giving you the preview any way?