My features list (by priority):
1) Working alarm with appointments of calendar apps (sound + notification message, both don't occur)
2) When selecting groups in contacts or phone just show the members of the group instead of showing all contacts and just marking the ones belonging to the chosen group
3) Switch mobile data on/off via PB menu
4) The possibility to sort by last names in phone app is missing (in contact app you can choose between first and last name, but not in phone app)
5) The list animations tend to make entries smaller or even hide them. This is not useful. Do the opposite, enlarge the list items in focus for better tracking where you are in the list.
6) The start screen in the phone app is pretty strange / messed up. Just replace it by the normal "recent calls" or add the possibility to choose/arrange your own start screen.
Especially due to the lack of the first feature I had to switch to another ROM
My phone is a Samsung Galaxy S2 I9100G...