I used Simba in the past (few months ago) and I'm an SRL Member on villavu.
I've botted pretty much only on mains (never really had a throw away, but there were pures and such) and Simba was my go to after the bot nuke and for botting in 07. I haven't botted since my last account got banned (Jagex heavily stepped up their monitoring/banning of bots) and I haven't bothered since.
I'm currently running OS X, but I was running Windows 8.1