At the moment, I'd definitely look into eating milk/eggs that way, but I'd want to eventually become vegan, as I am moving toward at the moment.
Morally speaking, it's a very tricky one. The quality of life for the animal is what I'm worried about here - they need an animal to take a biopsy from, so does the animal suffer? How is the animal kept - if they're kept in a tiny cage just to have cells harvested repeatedly then it's not exactly a good thing morally.
But at the same time, animals aren't dying, so it's probably a lot better than the current industry IMO