I personnaly only use AMP for CAB packaging, to avoid future issue with Nokia so I don't know a lot about AMP's SIS packaging.
One of the interesting feedback I read is Emanuele Cipolloni's one since it's about UX on Nokia devices.
It also could explain why people had problems installing Nespresso's app.
...installation and actually setup & running will still be a nightmare..
I won't copy/paste his comment here, so jump read it (and post a feedback to Mark if you haven't already did it)