You dont see the artifacting then?
It can never be better than analoge because it has a d/a and a/d converters and the transmiter and receiver then it just goes in the same analoge socket my phone would go in.
Yea they are cheap and also easy to set up an exchange with, but a bit like comparing wireless to wired LAN, wired is best.
I once tried my *expensivish* phone in the analoge port of my old T/A and I can say its a pitty we cant have a fully digital phone network:(