Can't beat a good mechanical gauge for quick glances when driving on track etc, you know where they're supposed to sit and it's easy to spot if they suddenly move! Very trick those digital dashes and i know they've got alarms etc just don't think they're so easy to read in the situations you'll be wanting to (my opinion obviously)! Racetech in mine, can only assume how accurate they are but i know the boost gauge reads a couple of psi lower than my greddy boost controller....though how do you ever know which one is right lol?!