kiwi obd bluetooth adapter

I saw tbis bluetooth adapter that pkugs into the obd port and feeds the data to your phone with an app, torque pro. Have any of you guys used this? And is aan obd gauge (like the p3) as accurate as a mechanical gauge? Does it measure actual boost or whatvthe computer is requesting from tje turbo? And is there a big difference betwren requested and actual boost? Thanks!!!

You cannot get accurate boost on the GTI using the generic OBDII protocol, that's why the P3 gauge optionally accepts input from a separate boost sensor.

I have one and use torque app on my nexus 7 and love it. with that said I also have a awe boost gauge in my can. Torque is close but you have to set the psi to were you live. For me it is with in 2psi of my awe. I use mainly to clear codes.