I know people do that but I wanted a more well established bacterial population before I put fish in so I cycled mine the old fashion way using Dr. Tim's Ammonium Chloride. You know, put in the One and Only, add ammonium chloride, wait until certain parameters are reached, add more ammonium chloride, etc. I did it straight up how Dr. Tim's recommends it be done. I think it took 14 days total.
What I liked about doing it that way is that you can add a rather large amount of ammonium chloride directly to the tank and really let the bacterial population grow.
Once you put fish in you kinda put the bacteria on a slow growth route because how much ammonia does 2 fish pooping and excess food product. I liked being able to add the ammonia straight to the tank and let the bacteria population grow. It takes a bit longer but so what, it's better to go slow.