Currently we're on 4.1.185 and I'm looking to move us to 18.104.22.168 or 22.214.171.124, any recommendations on these versions? My main question however is the length of time, obviously there is the time involved in upgrading the controllers (3) 4404's, what is the average length of time for AP's to upgrade? Each of our controllers has about 60AP's each currently and being a Hospital it's difficult for us to drop our network for a length of time. Has anyone seen any improvements off of the newer version, if so what and what version are you running now? I appreciate any comments.