My experience is that 99% of hotel reviews from credit card bloggers are glowingly positive. The review will show glossy photos of the suite upgrades, "free" breakfast, and club lounge offerings. There will be no mention that they were overcharged on price and/or points.

There are a few bloggers that post honest reviews. I think Loyalty Traveler and Wandering Aramean have shown integrity over the years. And I’ve seen honest feedback on Jetsetter’s Homestead blog.

Which bloggers are willing to post negative reviews?
Which bloggers are the biggest hotel pimps (100% positive reviews of poor or mediocre hotels)?

Also, if a negative review does somehow get posted, have you seen a blogger delete a review due to pressure from a hotel?