Pros

1. Intuitive
2. Multiple installations (different Web sites) can be monitored from a single dashboard
3. Supports multiple agents
4. Different installations can use different sets of agents (unlike Tidio)
5. Smartphone app makes it easy to use anywhere
6. Agent can see what visitor is typing in real time
7. Supports shortcuts (macros)
8. Supports automated triggers
9. Very easy to install/activate
10. You can use it to create standalone chat pages (hosted at tawk.to)
11. Can be customized visibility options (i.e., where widget will appear/not appear) from settings. But... (see Cons)
12. Can use shortcode for displaying the widget
13. Supports scheduling