It's interesting everyone's saying the UX is bad. I've had consistently good interactions with Vanguard's support over the years. I regularly get to talk to an actual human without waiting more than 10-20 minutes, and they're very helpful about getting things done and giving even basic advice about tradeoffs in different investing options.

The website isn't amazing, but I don't feel like it's terrible either. There's much worse 401k/IRA providers out there.