Arbi is fairly new site, they are quality though. Auto sorcegarden hasnt messed up for me before. I read on the Arbi site you can minimize the bot as for Auto you cant it messes up the paints.
isnt arbibots faster though, and less fail rate cause im barely averaging 80% on autosorcgarden pro :S and i also tried some bot called valids bot and it seems pretty fast it has a good success rate but i thnik there high ban rate