The phone was dropped and the glass on the front panel shattered. Everything still worked, luckily.
It went well, the guidelines and videos were really helpful. It took me about 45 minutes and the phone looks like new.
After disconnecting the cables between the LCD screen and phone's innards, repairing the glass and then trying to reattach the cables, I struggled for a few minutes trying to do it with my fingers. In the end I used the tweezers that came with the repair kit. Perhaps mentioning that explicitly would help people avoid the same mistake.