Hi Kris, we had no end of trouble when we swapped to the SR213, in the end a new Openreach socket cured it - go figure
Once we got it sorted it worked pretty well, did need rebooting now and again but so did the old SR203.
The Only frustration in the end was Sky won't supply their new WiFi 6 router if you've got a specific type of Sky Q box (which we've got), so after upgrading to their gigafast product last month, we jumped ship to Vodafone and have their Wife 6E hub and the difference is out of this world.
Hope this helps