First: I've repeatedly sent messages to the team regarding an issue with the web wallet. First message was a month ago. The issue is a severe security issue and should without a doubt be fixed asap. But: I have not received any response, and the issue is still there.
Second: When I first started mining it appeared that the official pool was rather buggy. I thought, well, ok, might get better. Didn't, at a recent try I still loose connection like half the time, not with any other coin I harvest. But mostly the issue with the webwallet is incredibly dumb. I'm not going to give more details here, just say that it involves badly designed form and I've lost a substantial amount of my coins due to this.
Third: I do like the design, the availability of a webwallet and so on, but if the outside does not deliver, then it is merely an empty shell, tempted to say a shell full of s***. Nobody wants that.
In conclusion: don't buy, don't invest, don't mine!