I have just tried it El_Quappo. On my Macbook, it only shows the two monitors connected via HDMI and VGA mirrored. Maybe I'm too stupid to set it up correctly so that the two monitors are displayed independently of each other, but the description also says "The IB-DK4040-CPD has two different video interfaces that allow simultaneous connection of HDMI and VGA display devices in mirror mode".
I.e. if the mirroring is OK for you (e.g. to display it for movies on a TV because Airplay is just too laggy, as in my case) then this device is sufficient. But to work on 3 monitors at the same time this is not the device you are looking for... btw. my keyboard connected via USB always has problems being recognised - on the Windows business PC as well as on my Macbook (it has backlighting, i.e. the keyboard may eat up too much power, but still very annoying).

Hello El Quappo, yes it has a VGA and a HDMI port, so it should work, of course it depends on the monitor, but there are adapters for everything else. Otherwise, I find it ingenious with all the connections it has.