Just read through that link you posted...
It's a bit confusing.
from what i understand the 'Just surf uncapped' @R99 can only be used for web browsing and e-mail. No downloads allowed.
That account is shaped (which is fine) whilst the other 2 are unshaped.
What bothers me is that the 'just uncapped'and 'just uncapped express+' specify that there is an Acceptable usage policy (AUP)'
This usually implies some form of throttling or maximum usage once certain thresholds are reached. (usually there's a whole bunch of other legalese about abusing the network, intellectual property etc. etc. as well)
I can't find information on the site of what their AUP actually entails. I'd make sure to check on that if I was you.
The 'just uncapped express+' seems to imply that if you for instance take a 384Kbps package with them and you actually have a 4MB/s Telkom ADSL line that you will receive 'full line speed after hours', i.e. 4MB/s. What after hours constitutes is also not clear from the web site.
I would check out the offerings by Afrihost and MWEB as well.
I have used Afrihost in the past (before the rise of uncapped their capped rates were the cheapest around) and was very satisfied with the quality of service etc.
Some links:
http://www.afrihost.com/site/product/adsl_uncappedhttp://www.mweb.co.za/productspricing/InternetAccess/ADSL/BigtimeSurfer.aspx Weigh up the options and decide what's best for you.
I really think they could have given a bit more detailed information on the packages and associated condtions etc. on the web site.