Once the knife edges wear out on the tremolo (which was pretty quick in my experience) it is very hard to keep in tune, I had the fortune of being able call Ibanez and get them replaced. Of course If I had to make a recommendation to you, I would recommend a Jackson (of course I now endorse them) specifically my Signature series Ahahahahah, the knife edges on the Floyds are more heavy duty and will last longer. I would also recommend the ZR trem from Ibby but the problem with that is they only offer it on their lower line S series 7 string, so you would have to deal with that.
There will be more options coming in the future.
Take care, Chris.