Codetel DSL is fairly reliable here in SD, it doesn't go out here and I have a pretty good ping time reply, no latency.
What is bad news for those who like to download movies and music through P2P programs (Kazaa, Edonkey, Utorrent) is that Codetel have some Quality of Service (QoS) equipment that control that kind of traffic, almost blocking it out entirely, so they could use their bandwidth to give priority to Business DSL lines and HTTP traffic (Explorer, Firefox, browsing in general). Tricom has the same stuff too, I'm thinking about moving to MaxOne, lol.