Filthy bugs and glitches. Notification don't appear or appear multiple times, the bubble-head feature is completely unstable, sometimes it goes off the screen, sometimes while trying to open it it closes. At the same time, the app is very heavy and ram-hungry for no reason, opens slowly (my phone is ok in terms of hardware power) and generally a bad experience. If it wasn't so used and adopted by the people around me I would instantly switch to another app.