They work well and all but they have a greater chance of ban/roll back because so many people use it.
I would recommend RiD as it's flawless and nobody has ever been banned using the guide lines. I personally go 12-15 hours a day and have not been banned/received a roll back. The only problem is that RiD requires a payment for a certain amount of hours. It's mainly if you do not want to get banned.
I believe they have autocurse pro, swamp tars, and some other bots for free, i wouldn't recommend using them though. the site's been down lately though i think.