We started with Slingshot couple of years ago and swapped to Vodafone after Slingshot went shambles with their speeds.
Then happy one year with Vodafone until couple of months ago ADSL dropped off completely for a day and a half.
After outage was sorted out things looked pretty good (2Mb down during non-peak times) until last few weeks it has been barely enough for working from home with RDP and VOIP.
Latest results from Saturday morning which for sure is not peak time?

Where to go next? Change ISP?
I'm guessing speed is down due exchange which to my knowledge was build around the same time as Christ was crucified.
[offtopic]
Maybe NZ would be more interesting for IT companies if basic infrastructure was good enough to support doing business successfully outside 3 biggest cities. Right now it feels like software development is being driven off from NZ by greatly overpriced and substandard service from internet providers.
[/offtopic]