I've only used the Defi stuff so can't comment on the quality of the other gauges. Defi stuff is really nice though, really easy installation aswell & IMO if you are running more than one gauge then Defi will be the best option. You need the control unit to run them but once that is installed then you don't need to wire anymore gauges in - just plug the sensor into the control unit & fit it into the location needed & then daisy chain the gauges