Although my Cupra R ST is different from your car, I can tell you I'm very happy with the tune done by TVS Engineering about half a year ago. Drivability is great. Very smooth in Comfort mode while driving in traffic or cruising around, still with all power available. Very sporty and direct in Cupra mode, it goes like a rocket.
They did their Stage 2+ tune for both engine (ECU) and DSG (TCU), with modifications on the intake path. As mentioned already by others, their line of stages is different from others, their Stage 2 can be compared to the normal Stage 1, which is a custom remap without further modifications. Their Stage 2+ adds desired modifications to that (still with stock turbo). For details see my review elsewhere in this forum: https://www.seatcupra.net/forums/threads/custom-remap-stage-1-plus.459156/post-4941390
My tune was done at their head quarters, but tunes can also be done at their dealers/partners. From what I'm told the files are being sent to and from head quarters, same for needed custom modifications to the files.
They did their Stage 2+ tune for both engine (ECU) and DSG (TCU), with modifications on the intake path. As mentioned already by others, their line of stages is different from others, their Stage 2 can be compared to the normal Stage 1, which is a custom remap without further modifications. Their Stage 2+ adds desired modifications to that (still with stock turbo). For details see my review elsewhere in this forum: https://www.seatcupra.net/forums/threads/custom-remap-stage-1-plus.459156/post-4941390
My tune was done at their head quarters, but tunes can also be done at their dealers/partners. From what I'm told the files are being sent to and from head quarters, same for needed custom modifications to the files.