Floating Docks are ideal for deep or fluctuating water conditions. A big advantage of a floating dock system is it stays at a constant height above the water which is ideal if you keep a boat moored to it.
When choosing a floating dock it is important to have an idea what you plan to use it for. Just looking for a small dock to get out to your boat and do most of your relaxing on shore? You may be content with a 6′ wide system. If you are planning to spend some of your relaxing time on your new dock you will want to consider one with more stability such as an 8′ or 10′ wide dock.