heapsort: The $19 packs are tempting but we'd have to bump up our usage to make them worthwhile. In my family we have three prepaid 2degrees phones and each runs around $10-15 a month, with a $30 topup (smallest amount that gets a chunk of free texts) lasting 2-3 months.
I'd also want to be sure before buying a 2degrees value pack again, that the double charging problem is absolutely fixed. Way back when I had a data pack I got charged twice for each monthly auto-renewal more often than not. I know there was a Geekzone thread or two about it, but haven't heard it is definitively sorted.
I had the same problem with the data packs but have never experienced it with the $19 packs.