Just a small correction.
The links that were provided earlier in this thread were never intended to be established guidelines on ECCIE. They are simply some review writing tutorials written by some very established review-writers back in the days of ASPD. The intention of posting them here was simply to save them in our ASPD tribute time capsule before that site went belly up. They both include good content and it's great material for folks new to writing reviews.
The following link explains what constitutes rejection for premium access:
http://www.eccie.net/showthread.php?t=24105
Obviously being a national board with 50+ mods approving and rejecting reviews there can be slight variations in the interpretation of what's acceptable for PA and what's not....but we're always discussing it and there's always an effort by staff to stay on the same page.