1. Kik - Messaging & Chat App is a revolutionary messaging application that offers a wide range of functions and features to enhance your communication experience. With this app, users can send instant messages, photos, videos, and even share various content within a secure and user-friendly interface.

2. One of the most attractive features for users is Kik's unique username system. Unlike traditional messaging apps that require users to provide their phone numbers, Kik allows you to create a username to use for communication. This provides a level of privacy and anonymity that many users find appealing.

3. Kik has amassed a substantial user base globally, with millions of active users. The application's popularity continues to grow, making it a preferred choice for people seeking a versatile messaging platform.

4. While Kik boasts a plethora of features, like any application, it can encounter occasional issues. Some of the common issues reported by users include occasional lag or slow performance, occasional message delivery delays, and difficulties in managing group chats efficiently. However, the app's developers consistently work to address and resolve these issues by releasing updates and improvements.

5. Advantages:
- The ability to use a unique username instead of phone numbers provides increased privacy and security.
- Features such as instant messaging, multimedia sharing, and group chats enhance communication possibilities.
- Kik offers a user-friendly interface with a wide range of customization options and integrated web browsing features, allowing for a seamless experience.

Disadvantages:
- Users occasionally encounter minor technical issues, such as lag or message delays.
- The anonymity provided by the username system can attract unwanted or unsolicited messages from strangers.
- Some users may find the app's extensive features overwhelming or unnecessary for their messaging needs.

In summary, Kik - Messaging & Chat App is a feature-packed application that offers a unique username system for privacy-conscious users. With its vast user base globally, the app continues to thrive, despite some occasional technical issues. While Kik certainly has its advantages, it is important to consider the potential drawbacks when deciding if it is the right messaging app for your needs.