Sonia, your username startled me at first glance, as my real name is also Sonia (spelled the same as well) - too funny! On my first hatch of button quail, I really didn't know what I was doing. I had hatched chicken eggs before, but only in a simple box with a standard light-bulb strung through it and a damp towel laid over the top (had never used an incubator before.) With my first incubator and first batch of buttons, I had the wrong temp setting, wrong humidity, wrong everything, and ended up with only two hatching out of six eggs placed. One hatched normally, and the other I "helped" out of the shell, but it had multiple issues and died soon after. Since that first hatch, I've experimented with different temps using a different incubator, and have had more successful hatches. So, to answer your question, I think the difference between an easy hatch and a more difficult one really depends on setting up the correct incubation conditions. I also think proper nutrition of the breeding birds that produce your hatching eggs plays a vital role in how successful the hatch will be. Also, if you can find a local breeder in your area who cares for their birds well, you may have better success with the eggs hatching as opposed to using shipped eggs that have been rattled and shaken while in transport.