How can I log wireless device connections and disconnections?

You must be having issues with devices dropping?  I just put in an Orbi RBR50 RBS50 & RBS40.  And its all over the map.  Netgear support spent 3 hours on the phone with me yesterday.  Finally escalated it to next level.

Very Very disapointed so far

I hope you get a response, as I would like to know this also.

I also notice devices, when they actually show up in the device list, they switch from 5ghz to 2.4ghz and back again, over and over at random times.

I have been taking readings from my cell phone periodically throughout the day and my upload & download speeds have been every where from 15mb to 150 mb (which I have FiOS 150MB up/down).  Such big shifts in throughput with nothing changed or no additional usage on my network.