The Hornet is honestly a fantastic module and worth every penny but as many have already mentioned it is still not feature complete and certain systems are quite buggy and need a lot of polish. That being said, it's a good time to get in on it with the Hornet/Carrier package being on sale if you dont mind dealing with an aircraft still in Beta, or alternatively, putting on the shelf for a while while its development progresses.
I own the Hornet, among most other aircraft, but I really wish it would get all of the features completed and polished up. I just really don't enjoy learning systems and flight characteristics that I know will change down the road when they are eventually fixed, forcing me to basically get accustomed to them all over again.