I have a Telkom Sim, Landline phone and 10mb adsl with uncapped internet from Telkom.
My adsl and internet just works, truth be told, i may have a problem with my line once a yr, but a phone call to Telkom fixes it within the day. My internet is up 99.99% of the time, 1% for loadshedding... i only stream content at home, movies, series, music and there is never a lag or buffer issue unless its on the other side, plus the price im paying for all of this is way cheaper than having my line and isp separate... i actually saved R300 bundling the whole deal with Telkom...
I'll give Telkom an A rating for service, all in all quiet satisfied with my product and service from them, if i have any issues, its resolved over the phone, glad i switched to them 2 years ago