I have a digital Doc 5, it is able to run / monitor 8 fans and each fan can have its own Temp sensor dedicated to it. It monitors Fan Speed, Temp and Voltage. The only thing I dont like about it is that with my tornados, it turns them On or Off, no inbetween. This sux cuz as soon as one is on for 3 seconds my case temp drops 2 degs making the fan turn off, then around 10 seconds later it heats back up again and turns back on for another 3 seconds LOL
I mainly use it for the Warning messages / ease of use so fan noise aint a big issue for me.