No problems for me that you have described although not driven it at 70 much and in 6 weeks only done 600 miles lol. Hill start is really smooth for me, I am shocked at how good it is.
Enjoying the car with no real issues so far. It's the most fun car I have had for many years and I love driving it, so much better than our 14 plate yaris whihc I now hate to drive.
Mine was 2 days later than they said so got half a tank of fuel free. Also gave me a courtesy car for 2 weeks as our old aygo had to go back before the new one arrived.