I used the wifi throughout December on the 450's and it was a generally good service. Since last week however, I have only been able to use it for one of my journeys (I make two journeys every weekday).
I have had:
* Wifi not available at all
* Connecting, but never actually obtaining an IP address
* Connecting, but the sign in page never loads, even after several tries
* Connecting, sign in successful, but then the service is so slow that it is completely useless
I complained to SWT who simply said to take it to NomadRail. I'll be putting together the details of what happened and which carriage I was in then sending them the details. I'm not really hopeful that they will do anything.
It's a bit disappointing as it was a fairly decent service for being free, yet now it is completely unusable in most instances.