To be brutally honest, I don't think it looks very professionally made.
It seems "unfinished" in it's look, and the price seems high.
I searched for "custom baby onesie" and came up with many more professionally made items, selling for close to the same price as yours.
For example, there was a shop with the babies' name appliqued onto the onesie, like 5 or 6 letters and some cute little flowers, for $24. And a great picture of a baby wearing it.
I'd buy that one in a second, if I was shopping for this type of item.
Though I don't have babies, if I were looking for something like this, I would not order from you.
Sorry...