The title says it all... who's review do you feel gives you the most useful information.  Too many times do we see a review without a layout, surface, lane condition, or sometimes even a description of the ball reaction.  I'm sorry but just because you shot a 300 with this ball doesn't make me want it any more or less before reading your review.

Personally I believe that JessN16 has the most informative reviews.  Whenever he posts a review I tend to read it, because I feel as if I gain a lot of useful information.
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"So there I was... BALLS DEEP!!!"

My Arsenal:

Storm Ace
Roto-Grip RSX
Ricochet Revenge
Total NV
Rival

i agree that most reviews on here tell you nothing other then a figjam.

with that being said the only reviews I trust as well as get information from is straight from BTM. ill see if others are having success with a certain ball on here but my choices now come from BTM and watching others throw it on the same condition/house.
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tournament average: 219

tweener
medium revs
medium speed
specs and ball layouts in profile

currently throwing
Visionary (O.P. / O. SS. / Glad S.)
Rotogrip (rogue cell)
lanemasters (black pearl)

Jeff Richgels does pretty good reviews.  I think Britton's are also pretty informative.  I'm sure others that have been mentioned are good as well.