I like how it is easy to navigate through, even if i am not familiar with computer science or programming in general! It's also very simple for me since my English isn't perfect so sometimes when communicating over email/chatting things get lost along way (and this can be frustrating).
The only thing bad about star cooperation was their price at first but now they are more reasonable which makes them easier of afford as well!! They have helped our team create multiple programs including websites & apps all within 2 weeks time.