I have the ellipse 1 on my 288 runners and am very happy with them. Some have said that the ellipse profiles are an easier profile to get used to than the quads. For me, a constantly changing, seamless arc of an ellipse made more sense than trying to blend together 4 radius' like the quads do. Again, this was just my rationale in my own head. I almost went down the rabbit hole of trying a bunch of different profiles and pitches to find the "perfect" one, but in the end, after a couple of weeks of skating on my ellipse profile, i felt it was a noticeable improvement for me in terms of feeling more balanced, stable and agile like it was marketed as. A year and a half later, I am happy with what i have.
Mind you, I also spoke with the shop owner Anthony @kkskate who did my profiles to try and get them dialed in. I told him what skate I had ( Graf Ultra G75's that have a built in forward pitch / lean ), the runner size ( 288 ) and my skating style ( bit more upright D man ) and we altered the pitch that the profile comes with so that I wouldn't be leaning more forward than what I was used to. As I said, they came to me and I felt good from day 1. A month later, I felt even better.
I also think pro-sharp could do a better job marketing the ellipse profiles if they would disclose the radius of each area. Even if it was just an approximate number from toe to heel, they should how 5-6 radius in each area, again, even if its just a close approximation. With all the other profiles, you know what that the radius is in each zone............ the ellipse, its a mystery.