I know there is a slight difference in the components, but back in 2015 I had the S3 saloon and I had the stage 1 map through Revo which was about 350-370 and I did 20,000 miles of absolutely thrashing the sh!t out of it constantly as I was still a bit irresponsible as I was only 20. I never had any issues with the engine, the only thing that did get too hot sometimes was the Haldex coupling and I would have to turn the car off and on again, otherwise I was driving an S3 with front wheel drive only, which was quite fun actually and surprisingly fast about 4.9 - 5.0 seconds to 60mph with FWD only, obviously it was around 3.9 with the 4WD. Never had any engine issues.
I also had a REVO stage 1 on a fiesta ST and I battered the crap out of that too. I swear by REVO. I'm currently running a £175 map on my GTD and although it is nippy, it is a bit lumpy and a bit inconsistent. It feels like it makes it mind up as to how much power it gives me, sometimes stockish power, then when its in a good mood it feels more like 225-230ish and occasionally has a flat spot in 3rd and then a big surge in 4th. I have learnt my lesson about sh!tty maps and will be visiting Devil developments or Revo when I have a bit of spare cash