Advantages and Disadvantages of a Flat Bottom Boat Hull Designs
The advantages and disadvantages of flat bottom boat hull designs are limited; however, they do exist.
Advantages 
The first obvious advantage which can also be viewed as a disadvantage, of having a one of these types of boats, is that they come in relatively small sizes which explain why they are occasionally called small open boats or john-boats. 
They can be used on calm waters like ponds, slow rivers and small lakes because they usually don’t handle very well within choppy, rough waters.
They make great boats for fishermen because their designs are idea for working shallow backwaters as well as weed patches usually found on lakes and rivers.
The flat bottom boat hull is usually built wide which will provide a lot of space for those fishing expeditions.
The material which is used to build these types of boats is readily available and low-cost.
These are just a few of the advantages of having this type of boat. Depending on what your mission is, this can be the idea boat to “git-r-done.”
Disadvantages
As mention above, one of the first disadvantages of a flat bottom boat hull is that they’re usually small in size but I guess that would depend on what’s it being used for.
The rides can be very rough in these boats.
They are usually restricted to very low horsepower motors; primarily because they don’t fair very well at high rates of speed.
Boaters that are searching for all-around use of their equipment can fair well with nearly any hull design under any water condition. Hull design in the boating world is a work in progress and continual developmental project. Whatever hull you choose, just make certain it meets your particular needs for all intended purpose. There’s nothing fun about being in the open waters in a boat that fails in its purpose.