This is a fantastic disc.  They market it as a more stable Saint (and in better plastic) and that is exactly what it is.  I've thrown it about 2 dozen times and it does the same thing everytime. On flat it'll turn a bit before fading out, on Hyzer it'll flip to flat and ride straight for a good distance before fading out, I really don't need to throw this on anhyzer so I haven't really tried that.  I have the Escape in Supreme plastic for turnovers.  This has very similar flight numbers to the Escape in Supreme plastic but I find that the Escape is way more understable than the Sweep. 
I'm loving this disc so far and it might knock out my Opto Saint.  
I will say that the Royal Grand plastic tends to beat in and get understable, It'll beat in fast but then it just stays like that forever.  I have a 4 year old Royal Grand Grace that should be a roller disc by now due to how often I throw it, but it has just maintained the same stability for the last 4 years.   Grand plastic is the best (I'm a fanboy).

Latitude knocked it out of the park with this one! I'm primarily a Latitude 64 thrower and am always getting any new releases from them, especially Royal Grand so it was already foregone I was getting this disc and completely exceeded expectations. I was looking to replace my beat-in Lots and the Sweep easily knocked it out the bag. 

Played two 18 holes with it on a mix of park style and wooded play and this thing does it all. Has very much a point-and-shoot feel and play to it, great hand feel and plastic is unmatched. Whatever type of hole (open vs wooded), this disc can be manipulated to do everything. Not super overstable, but very reliable. Has the perfect amount of turn and GLIDES FOR DAYS. I was surprised at how well this disc holds any lines and glides through it without being too influenced by it's tendency to stay in the air (unlike some other 6 glide discs I've thrown). Overall, a neutral disc but can provide great turn through the flight and confidently know it will always come back. 

If you are looking for a true fairway that can push distance, shape any line and be a beauty to watch, you need to at least give this disc a try. 10/10.