Types:
Powerbot
RsBuddy
EpicBot
(there are more but these are the top)
I used to use powerbot.... but adding scripts was really annoying and failed like half the time, but they do have a larger variety of scripts
RSbuddy is probably my favorite cause its so simple and there's a great variety (not as much as powerbot, but still a lot). Adding scripts takes a click of a button.
Epicbot is more skill based, like fishing, mining, cooking, etc.... its still a good bot, and works well.
Answering your question:
Use powerbot cause there are a lot of flawless scripts