I use it for linux. Recently there was a bug where if you had a chat opened, it would pin one core to 100% usage. It also lacks feature parity with the mobile client (ex: gif search and send).

+1 for linux cluent, absolutely no complaints

I use it on windows. The client is totally fine for the most part.

Though for some reason it regularly screws up the device-connection, forcing me to reconnect the device, loosing access to every old message. Seems to be a rare bug though, as my family also uses the windows client and theirs never has this problem (out of 8 device 1 has this problem)