I'm a whoosh client after about 4 years too

I'd be very curious to see how many Vodacom users have switched, because it actually seems like a fair number!
In that case, the existing Vodacom users may get a bit of a speedboost as the network won't be as congested ...
Downloads are around 3x quicker, uploads around 10x quicker and pings are a fraction of what they were (under 60ms locally). Occasionally I get too used to the Cell C, pop in Vodacom card, chuckle and return to Cell C with a big smile
I emailed support once and ... I received a reply with 12 hours! Not automated - from an engineer themselves!
Sad thing is Vodacom will still be getting my money until the contracts expire :/