A lot of people spend years looking for a disc they can throw a little bit further than the last one they bought. The Nova is for people who have the opposite problem. You should pick up a Nova if you're afraid of throwing too hard and blowing right past the basket. There's a reason Paul McBeth uses these for upshots, and it's because he can throw 500 feet. Honestly, I don't use the Nova in regular rounds because I don't throw as far as Paul. But I'm not going to knock the disc too hard, because it does what it's advertised to do. It flies exactly where you threw it, on the exact release angle you threw it, and then it sits down where it lands.
Now, if you're wondering what makes this disc so special considering that most putters are designed to fly straight, I'd like to compare it to Innova's flagship putter, the Aviar. The Aviar is undeniably a very straight flying disc for anyone from beginners to professionals. The Nova is also a very straight flying disc for anyone from beginners to professionals. Both of these discs will fly great with a flat release regardless of whether you have a big arm or a noddle arm. They can also both hold anhyzer release angles well, because they legitimately have 0 fade.
The biggest difference I find is in how these two discs hold hyzer release angles. If you release an Aviar with a bit of a hyzer angle, the Aviar will flip up to flat anyway so long as you gave it some power. For some people, that's going to be the most natural way to throw the Aviar, because for a lot of us (me included) it's just more comfortable to throw everything with a little bit of hyzer. If you do this with the Nova, it will NOT flip up to flat. You can throw a Nova with a little bit of hyzer, and it will actually hold that little bit of hyzer through the entire shot, and as a result it will end up ten feet left of where the Aviar would have landed with the exact same throw. Depending on what you're using the disc for, that tendency to hold the release angle can either be a good thing or a bad thing. The Nova is going to stay on the angle you put it on, and if you're not as precise with your release angles as Paul McBeth when throwing this disc, then you can easily end up off target because the disc doesn't have a natural tendency to turn or fade at all. It's a perfectly accurate disc if YOU are perfectly accurate, but I find that it's easier to be accurate with a disc that you know will flip up to flat and then fade, because that's how pretty much every other disc works, and it's not how the Nova seems to work.
Personally, this is the main reason why I'm probably not going to be using the Nova in a real round. I still like to have a Nova around, because it's an excellent practice tool for diagnosing any bad habits you might have. But I don't have enough confidence in my mechanics to pull this disc out when I'm competing against my friends, because sometimes this disc can make me look silly. I do definitely recommend you buy a Nova if you're serious about improving your backhand accuracy, or even if you're a beginner looking to learn good fundamentals, but this disc isn't going to immediately improve your score. Instead, the Nova will give you the option to do the hard work of improving yourself so that you can throw OTHER discs with more precision because you took the time to practice with this one.