Been a Westnet user for about 6 years. NO PROBLEMS WHATSOEVER! Every issue you may have is instantly resolved (where possible), Customer service is in AUSTRALIA (isn't that a novelty these days!), tech service actually know what they are doing and don't read a script.
I do not intend switching from Westnet any time soon. I did notice SOME changes (slightly negative ones) after the iinet merger/buy-out, but those seem to have been resolved, since I believe iinet found Westnet's "way" better
Just a brilliant ISP.
Here's a simple example - since moving to our new home, I have not had the occasion to ring Westnet since they reconnected here (free, I may add). That's been 3 years!