Why I like slack :
I am software developer, I stay online more than 8 hours in a day , I like this app because it is easy to use , user interface is also nice , I have also created many channel on slack .
We chat , share files , sometime video conferencing also , it perform good if internet connection speed is good , you may face problem if net is slow .
Funny smily but notification issues it has , but you can it perform well than skype .
Our organization's many clients are using slack because its performance is good.
Dislikes :
Notifications issues.
Will not work well if internet connection speed is slow.
Recommendations:
Yes you can use it is better than skype.