@alasta ... I have reported here a few times that my Voda TV is working just fine, and has done for several months now.
I am in Wellington, on HFC and using Ultrahub router.
In all that time I have experienced just one glitch lately, and that was when watching a TVNZ Ondemand series ... after an advert break the stream jumped back to the beginning of the episode but simply fast-forwarding got me back to where it left off. I suspect this one time glitch was at TVNZ's end rather than the Voda TV.