A confident DIYer can usually install a standard close-coupled toilet, but Geberit's wall-hung systems require more advanced skills.
DIY Installation
Pros: You save on labour costs, and it can be a rewarding project.
Cons: There is a high risk. If you install a concealed cistern behind tiles incorrectly, you might have to remove the tiles to fix any leaks.
Professional Installer
Pros: A professional installer guarantees a watertight fit, ensures the frame is level, and is often required for the full warranty.
Cons: The main downside is a higher upfront cost.