I've read both of the reviews you gave and one of them seemed like a "Hey, that was good," sort of comment rather then a review. There's no problem with doing that, but it doesn't really qualify as a review. You should begin by looking at what others put into their reviews to get an idea of what the moderators are looking for. It's intended as a learning workshop so the more you put into it the more you will get out of it. While I do read a lot of the stuff in the review room I don't post as much as I should, it's my personal opinion that after a piece of work has had three or four reviews then there's not a lot that I can add to it so I think that posting what others has said isn't really helpful to the writer.