Disclosure: I received this in exchange for my honest opinion.
So when I first saw this I expected the giant one from the movie big and figured oh crud where am I going to put something that big. However when it arrived I found Homeco's version of Gigantic is actually about the size of a couch so it's perfect for my house. We tried it out a bit and I have to say it's pretty awesome. Key things I as a parent love, the Volume control is easily adjusted so when it's time to quiet it down or the same key is driving my eye to twitch the kids have no excuse when I ask them to turn it down. It has 24 keys so there is no excuse why two kids can't make music on it together, which is also a vital in my house. It has 8 different musical instruments to play as well which gives variety to the sounds they can produce. It has automatic on/off so when the kids forget it on and go to bed they won't wake up the house on their way to the bathroom at night. I also like that it only requires 4-AA batteries, that's a great cost saver too. Overall I think this is a great gift and will be so much fun for the kids. On the parent annoyance level of toys I would say this is less than a Furby but more so than a ball.
The quality is there and the level of excitement over the gift will definitely be there. If you play piano it definitely won't replace your a piano but it could make a fun game of learning with you little ones.