They are very easy but they do have limitations. There are many other techniques that grow faster, larger and healthier plants. Drip, Aeroponics, Misting and Fogging just to name a few. None of them are as easy as a DWC but don't ever think just because it's easy it's the best. Some growers can take it personal but hey thumbs up to you for growing Hydro over dirt anyway. After a few years you will get bored and want to try something else.