I have one of these. They are a very basic EBC, about as simple as it gets. They are easy to use and work as advertised. What more is there to say? The hardware is actually top quality.
They have 4 preset boost levels, switch with the push of a button. Gain and duty control for each preset.
My friend has one. I don't like the look as it shouts out "look at me I’m cheap from ebay" however he has been very happy with its performance. The only thing I noticed is that it don't know/display vaccum . If you’re at idle then it display 0.0 it's only when there is positive pressure it starts to count. I don't know how well/accurate it can deal with the boost control; I suppose you will need to see the boost graph on a dyno.
I have the ms-ibc which is the higher model one. Its been totally faultless and holds the boost really well, its better then my old blitz duel sbc. I would recommend one of these to anyone and when its fitted all you see is the screen which is black when turned off so doesn't shout out nick me.