Almost 14 years ago I met a wonderful, caring bird breeder who bred the type of parrot I was looking for (Yellow Naped Amazons). When me met, we instantly hit it off and have become BFFs since then. When her Amazons finally laid eggs, hatched, and 3 weeks later she pulled the babies, she invited me over so I could watch and learn how to handfeed. Now please bear in mind, that I didn't get to actually handfeed any bird until my Hunter and her brother were 10 weeks old.
The first time was VERY scary, even though my friend was right there with me, guiding every step. It took me 2 weeks to feel comfortable enough doing it, and at 12 weeks I brought my Hunter home - on one handfeeding a day.
I've helped handfeed many baby birds since then, from cockatiels to macaws, and it is a wonderful experience IF you know what you are doing.
I would never recommend to anybody to buy an unweaned baby bird, unless they are trained and comfortable with the rearing process. Temperature of formula must be right, consistency of formula, amount needed, making sure not to aspirate, etc.
Was it worth it for me? Absolutely!