Trello integration and task assign to the user is really a nice feature for fast problem-solving. I am very impressed with this software and its capabilities.
I like the professional looks and simplicity. It does reliably what I need it to do - which is, to exchange messages with my friends and colleagues.
What I like most about Fleep is ease of use. Additionally, I like its deployment architecture since it can be installed in Mac, Windows and Android.
I do hate that you cant copy normally to another app on Android 8.0 (a fleep link is pasted instead).
The conversation list can become very long and uneasy to read when using Fleep with email (obviously it's not designed for that).
Weird sound glitch that plays all the notification sounds in a row when connecting a new audio device, this has not been fixed over the course of the past 2 years unfortunately.