1. Station Capacity: The HPC-400 supports 4 stations initially, with the option to expand up to 16 stations with additional expansion modules. This flexibility allows you to start with a smaller system and scale up as needed, which can be cost-effective and convenient for users with varying irrigation needs.

2. Wi-Fi Connectivity: Like other Hydrawise controllers, the HPC-400 offers WiFi connectivity, enabling remote access and control of your irrigation system from web browsers and smartphone apps. This feature provides convenience and flexibility in managing your system, especially for users who are frequently away from home.

3. Compatibility with Hydrawise Platform: The HPC-400 is compatible with the Hydrawise platform, which offers advanced water management features such as automated scheduling based on local weather data, water usage reports, and integration with smart home devices like Amazon Alexa and Google Assistant. This integration adds value and functionality to the controller, enhancing water efficiency and ease of use.

4. Expandability: The ability to expand the controller from 4 to 16 stations with optional expansion modules is a significant advantage, allowing you to customize the system to suit your specific requirements without needing to invest in a new controller.

5. User-Friendly Interface: Hydrawise controllers are known for their user-friendly interfaces, making them easy to program and operate. The HPC-400 continues this trend, offering intuitive controls and clear menu options for setting up schedules, adjusting watering times, and monitoring system performance.

6. Durability and Reliability: Hunter is a reputable brand in the irrigation industry, and their Hydrawise controllers are known for their durability and reliability. The HPC-400 is likely to offer consistent performance over time, even in harsh outdoor environments.

Whether the SPW Hunter Hydrawise HPC-400 is a good buy depends on your specific needs and preferences. If you require a flexible and expandable irrigation controller with advanced features like WiFi connectivity, remote access, and compatibility with the Hydrawise platform, the HPC-400 could be an excellent choice. However, it's essential to compare it with other models at similar prices to ensure it offers the features and functionality you require. Additionally, reading customer reviews can provide insights into real-world performance and user satisfaction with the product.