Didn't like the Polar FIS.  It's not suited to the sluggish response time of the MFD imo.  For example, a reading like boost which is up and down all the time, it was just a blur on mine.  Same with other readings that update frequently.  VCDS or a phone app would probably be better in that respect....I just wish Ross Tech would get with the times and offer something decent for a phone over wifi.