Genetic Modifications are a reality and we are already taking giant leaps in the field. However the technology is still in its infancy. Even though the end result would be a world free from all genetically transmitted diseases ,however the transitional period in my opinion is full of uncertainties.

To understand my logic you have to consider the fact the Genetic Modification on humans have not been tried as any other drug trials. Thus the available record set for the results of genetic modification is very small. Secondly the genetic makeup of each and every individual human is different thus it is highly unlikely to predict if a particular genetic modification would result in the same side-effects for all individuals.

As for as I am concerned I would not opt for Genetic Modifications on my Child as of now. But if you had asked this question 50 Years from now my answer would have been different. With eventual passage of time and more reported cases and test studies, we would be one day able to  have designer babies without worrying about the consequences of changing the gene's.