They usually get it sorted out pretty well, but their response times can be a little slow. It’s potentially not a huge deal for you, and overall they’ve been okay… this is sort of understandable because they’re in New Zealand and seem to want to make sure their support staff are paid well (though they were bought by a larger company recently, so I'm not sure if this still holds, seems like it did as of 2019, though):
This makes them seem like a cool company, and I'd like to support them... But despite that I do feel a little disappointed paying more for a worse service, and I think they really need to invest in providing interfaces for some of the more advanced DNS settings, particularly if their customer support is going to be limited by their own admission.
They also have some blog posts about customer service that give me some weird vibes...
Definitely in support of their customer service team in this example, and don't want them to be treated poorly or sworn at or anything... But it's a little weird to put this on blast like this and I think it'd be a better look to just leave it at "these are the things that would help us help you, we need to make sure accounts are secure so we can't just ignore passwords, etc etc"
And it's also a little weird that they have this post complaining about some web-hosts poor interface and customer service too:
Neither of these are particularly bad, but I guess it makes me a bit disappointed that I've run into similar problems with them, and I'm not sure they're doing enough to address things on their end.
I don't think I'd tell anybody not to use them because they have been good for the most part, but they're not as fully featured as other registrars in my experience, and they're more expensive.