If they've allowed for a few gigs of tethering, pretty damn attractive. And I guess attractive to mobile-only users even if not.
Great to see a new round of mobile data aggression going down.
Your move, Vodafone.
Ah, and here's the info on Spark's website. http://www.spark.co.nz/shop/mobile-plans/paymonthly.html
Speed reduced after 22GB, no hotspots or tethering.