Sometimes it's easier to text-chat, isn't it? Sometimes it's the best way to get more aware of our linguistic skills. And sometimes it's even better than talking because you get to review the conversation offline!
I just love chatting! I've been doing so since I was 15 and that is how I learned English. I also appreciate the fact that it is not necessary to use the audio/video feature, so it's perfect for those who prefer to focus on language learning without struggling with shyness!
Also, you can do this basically anytime and anywhere: from work, from home, on the bus or train, in a crowded place, from your computer, from your smartphone, etc! :)