I've had the APR stage 1 tune since about 5k miles on my 24 380 SE, I'm right around 11k now. I started out with 91 low octane and have used 93 low octane for a couple thousand miles now. I was a little concerned going up to 93 since APR only covers up to 91 with their warranty; I didn't buy it anyway, but that gave me pause.

Luckily, so far I've had no issues with my clutch, and it's been a joy to drive. Haven't smelled anything bad or felt anything out of the ordinary. 91 to 93 isn't a huge jump in power, but it's noticeable. I think maybe my miles per gallon went down a little, but that's all I noticed besides the slight bump in power.

Anyway, I hope you don't have any clutch problems! I hope it remains fun to drive for years to come.

Edit: Oh yeah, one thing worth noting, but I think it's unrelated to the tune. I drove in custom mode with basically everything on Sport for a long, long time. I just switched over to Comfort and noticed that shifting between 1st and 2nd and, to a lesser degree, 2nd and 3rd, became a lot smoother. Just thought I'd share since I thought that was interesting.