Maybe this is an ignorant question, but @ OP, why would you look for this service to supplement the lack of cell coverage in your area, as opposed to simply using whatsapp or skype calling over your wifi connection?
This is actually a good question. I don't see how they justify charging you R199 if you already pay for a contract with minutes/sms's allocated.
Especially when you have to pay for your own Wifi at home and land line.
@Cell_C why the additional cost to have something that benefits YOUR COMPANY (by having users use their own data and landline for your communication). The only time any charges apply is when it goes out from the land line to one of your towers (or MTN/Vodacom towers) to whoever I might be dialing.
The minutes are already included in my contract, I'm doing you a favor by offloading my traffic onto my own wifi network that I already pay for, why charge me R199 for that then?