Issues i have experienced sofar:

• i do get the new notifications on earlier detected devices,
• don't always see all online devices as online..(sometimes my iphone, which i am using to look at whats connected shows as offline)..  
• Parental controls don't work..(you can setup a new profile, but after adding it it won't show),
• Application / interface is very slow 

However network has been very stable since the upgrade (where before the upgrades i experienced connection loss from my satelites) and perfoming faster (about 48 hours on the beta), @wcg is it at heavy load when that happens or do you have something else configured..  crossing my fingers, i won't get randam reboots..

@timp78 , let me know if you are experience the device reboots from the network. .I can live with the software issues, but network stability is what i bought these for in the first place..

@LDE been WFHing all day and streaming music, plus whatever anyone else is doing in the house.  No drops outs noticed.

Regarding web interface, find it is best accessed via IE, Chrome doesn't like the fact it is using old TLS.

@timp78 ., @wcg , do you think if i would want to downgrade towards the original firmware i could use the web interface to do so . When using https://ping.canbeuseful.com/en#ping, i see long delays in returns want to validate if that also is the case on the original firmware..

@LDE not sure, do you have a copy of the original firmware

@LDE so far, I'm trying to understand if it will get rebooted everyday at the same time and then figure out the reason. But I would be doing exactly that, downgrade using the web interface.

@wcg seeing any clues in the logs?

@timp78 , @wcg, the original firmware you can download on the website of TPlink..Looks very simple , you can from the webinterface just select the bin file.. (a lot easier than the upgrede.. :-)..  just not 100% sure if it allows me to (or if it breaks the P9)..