What do you think of the experiment?

In general, I don't think there is a problem with an experiment that doesn't cause suffering to people or animals. If we have ethical problems about how to treat the creature that was created in it – that's a problem we have to solve with the body. When the thing is created, it will be possible to try and formulate a position on whether it is a person or not, and determine the appropriate treatment for it accordingly. Certainly if this experiment saves people's lives (by growing organs for transplantation into their bodies).