The bad 1% is stuff like removing from pocket and finding that the phone has rebooted from a kernel panic and waiting for the disc password to boot or the audio is wonky maybe coming from the phone ear speaker especially when paired to bluetooth in a car.
FWIW I am running the unstable branch so I get the latest updates but it is more crashy. I have not really tried stable since I first got the phone but phone calling was probably nearer to 100% and I do not recall kernel panics but it did have terrible battery life.