Since I am a relative newcomer to UL, and the type of person these articles may influence, I thought I'd chime in even though I'm late to the party.
I like articles that express what a reviewer didn't like and why. Even better are listings of what they think works better, or would like to see instead. Especially if the commnets espouse different gear packing or usage techniques / styles. Sometimes those comments give me good ideas to try ;)
I general, if a reviewer didn't say anything negative, I usually assume I can't trust their review since they may be too afraid to say something that would endanger thier relationship with the advertizers or are overly worried about what other forum members may say to be totally forthright...
If I just want to read reviews that don't say anything negative about a product, I can just read backpacker magazine's reviews.