Grandstream WP810 vs 820: First impressions for use in Healthcare environments.

A quick comparison on Grandstream WP810 and WP820 models after a week of mild use in a hospital environment.
Can these inexpensive Wi-Fi phones replace Spectralink, Cisco and Avaya/Nortel phones costing almost 3 times the price?
First of a series of videos on Wi-Fi phones.