I had the DTUK CRD2+ on a MK3 FR, it was great to begin with but after a few weeks it was constantly brining the coil light on which was getting more and more consistent, the only way it would come off is if I changed the map via the control box but eventually all settings was bringing the coil light on.
Wouldn’t recommend a tuning box from my experience as I took it out and got a remap and it’s been spot on.