I must say I think it might have improved the stability of my connection a little bit. It has also increased my sync speed, but only ever so slightly.
I have the latest firmware from the beattie agent but have not flashed the GUI back so can't do all that much testing.But I have been using BE1's get current stats scripts. Previously I would get a resync roughly every three days or so. When I first installed the plate, my connection resynced at exactly the same frequency, roughly every three days, but when I checked this morning, it has been running for 6 days and counting! Now whether that's just blind luck or whether these new filters have done the job I don't know tbh, I don't run the continuous scripts but when I last did, it used to show random spikes in the SNRm related to not much, although my line is far outperforming the BTw broadband checker speed tests which quote a speed of 43Mbps, whereas my sync speed is 66834.
Frankly I don't understand why its not full speed 80, because by walking distance my cabinet is just over 200m away, but I live on a triangle so possibly its going a huge way round which could double it to almost 400m, or else there's the dreaded aluminium present.