Voyager, they have been consistently awesome for the 6+ years I've been with them.
Sign up people were super helpful, made sure everything happened on time and got onto Chorus quickly when their subcontractor screwed up.
Had a configuration question cos I was trying to be clever and use my own router, help desk person was actually helpful and clearly knew what they were talking about, able to get it sorted super fast.
Always been consistently fast, clearly not over provisioned
No CG-NAT nonsense
I'm weird and want a static IP. Unless you are doing CG-NAT where IPv4 addresses cost you extra, giving someone a static IP is a one-off config change on a router somewhere, so it pisses me off that many providers want a monthly fee for this. Voyager just charges a one-off fee, then it's done.
Voyager has been on my radar for awhile. I only haven't switched because I managed to get a static IP on 2degrees for free and it works out cheaper than Voyager's max fibre plan.
+1 for Voyager, I'm with them also - have used them for the last 3 years and I don't think I've ever experienced an outage, speeds have consistently been great.
Fairly local peering too, so for my offsite-backup at a friends house in Dunedin where I also am based, the traffic only has to go via chch, rather than Auckland with some providers. Though I think some places like 2Degrees may have Dunedin peering. Not a problem for me anyway!
Static IP being one-off fee as it should be is a big tick. They also didn't raise my price for some reason when they recently did update pricing and I have a friends and family discount even though I don't think I'm friends or family :)
Voyager is on my list for the sane static IP alone.
Currently with Spark, which is all fine a good with bundled phone plans, but the IP fee is a bit wince inducing.