Read the uninet forums and judge for yourself...
http://www.uninetwork.co.za/~forum/viewforum.php?f=1&sid=3468dd1028e50827bdede03017a03611
I used them and cancelled after a short period due to:
1> Extremely poor, unstable pings on SGS games servers. I ranged from 300ms-3000ms. Unplayable!
2> FTP was unstable; very erratic.
3> HTTP was unstable, but OK if that was all I wanted from my connection.
4> Poor telephonic support.
5> Seemingly poor financial stability/management - They couldn't supply enough bandwidth because a few users hadn't paid for the month yet (this was the reason given to me for my bad ping times to SGS). It was explained by an employee on telephonic support that the +-R2500 activation/installation fee was desperately needed to keep the company going from month-to-month/week-to-week. You have to pay a non-refundable R1250(?) for activation, on top of R1200(?) for installation, because their financial model is poor/unsustainable?!?! Whether the already unstable service offerd to the userbase was sustainable on subscriptions alone, worried me... pyramid?
These are my personal experiences and seem to be quite common if you look on the forums above. Some things may have changed, but not from what I read. Problems tend to migrate perpetually due to cosmetic changes that do not address the root cause, of insufficient bandwidth to backup the broadband promise it gives to customers on its webpage.
If you just want web browsing and email and simply salivate at the thought of hooking up a wireless connection, Uninet is right for you. If you have any need beyond this, I would look elsewhere. WO are supposedly better and use the same wireless infrastructure.