I think it boils down to aesthetics and personal choice. There always seem to be nay-sayers and doom and gloom merchants whatever you look at. The Pebble has build quality issues? This one has screen issues? Take your pick.Looking to get a 22" this one has just popped into the picture along with the Pebble and it seems to have a few good calls so far, excluding the panel maker difference of course.
Big question then, better than a pebble or not ?
To me the HP doesn't look as bulky, a slightly cleaner design. The stand is good too, height adjustable and you can pivot the screen 180 degrees (should you want to).