Based on the user reviews on the Apple App Store, here are three pros and three cons of the LINE 2015 app: Pros: 1. **Easy to use**: Simple and intuitive interface makes it easy for users to navigate and communicate. 2. **Fast messaging**: Fast and reliable messaging feature allows users to stay connected with friends and family. 3. **Rich features**: Variety of features, such as voice and video calls, messages, and file sharing, makes it a comprehensive messaging app. Cons: 1. **Intrusive ads**: Frequent and intrusive ads can be frustrating and annoying for users. 2. **Data usage issues**: Some users report issues with data usage, leading to high bills and slow speeds. 3. **Lack of customization**: Limited customization options can be disappointingly basic for some users. Please note that these conclusions are based on a general analysis of the user reviews and may not reflect your personal experience with the app.