Tried it for a few evenings like a week after it launched. It's kind of strange, and there's a lot of issues.
One thing that happened while I was wasting my time trying it out was a lot of the heavily camped NMs had a "bug" where they spawned invisible. Yet, this did not stop anyone camping them from camping them. Leaping Lizzy was one such NM, and its camp had at least 30 people running around looking for something they supposedly couldn't see anyway.
The friends list function didn't work, and LSes cost so much gil that the people who started out pooled their gil and made LSes, only for their LSes to reach maximum LS capacity and be unable to invite anyone else, leaving a lot of folks friendless and LS-less.
Maybe some of that's changed, but good luck getting an in road for 75 era stuff without a friends list or LS to keep you sane.
Oh and, there didn't seem to be a way to play with controller. Big deal for me. I can't believe I played it as much as I did with KB and mouse. It hurts my hands to play that way.