While I’ve only dealt with Discover support for a couple of minor issues, it definitely left a positive impression. There was no automated system I had to fight against and a native English speaker answered right away. They were also knowledgeable and not just reading from a script. Definitely among the better customer service experiences I have had.
I have been using it for around 10 months now. The first couple months were great, but now it loses connection multiple times per week and that is only resolved after rebooting the modem. There was also a two week period that they were working on the tower and resulted in me having no internet during that time. It’s definitely annoying, but the only other option I have is CenturyLink DSL. If I had fiber or cable internet available, I would use that instead, but the slow DSL speeds make it worth putting up with T-Mobile’s unreliability.