biggest sell for me with adsl is the ability to buy (at a relatively 'reasonable' price) a 30 gig monthly package - (which at current IBurst rates, on a 3 gig package @R399 per extra 3 gigs - would cost R4000 a month)
I like the idea of having a 30 gig pool of data to use, and for another 600 or so, if I want, it turns into 60 gigs to play with every month. No extra fiddling, no workarounds, no proxies, just a big chunk of available data download that I can rely on.
For me, the amount of time and energy and money taken in trying to get IBurst to be consistent and reliable and deliver what I want, I'd rather pay someone else and get a guaranteed quantity of monthly data..