T-Mobile Plots Over 400Mbps/N41
I would say I've noticed T-Mobile getting even better around my area. I still have some problems at my home address due to switching between different modes (4G/5G), bands, and nodes/cells. I think this is because I am on a line between two sites and not in a clear coverage to the cells/sectors on either tower. Hopefully those statements make sense.
Here are the plots for the last few weeks of download speeds over 400Mbps

N41 Coverage

New 5G Sites (Since August)

One other thing I noticed more recently is that T-Mobile is having better ping times (less than 40 ms) when on the N41 network. This is great milestone.