I have had all models of nfinity shoes since they came out with the evolutions.
I love the evolutions for stunting purposes, they are light, but still manage to be sturdy enough.
I hate the vengeance, they are too flimsy in my opinion. And as a base I despise when my flyers wear vengeances, I never get a good grip on them. When tumbling or jumping the vengeance don't give enough cushioning for me, with results in the soles of my feet to hurt.
I enjoyed the Halo's, mainly for tumbling. I rebounded better and higher and the shoes where sturdy but still light. LOVED to jump with these shoes! Although I didn't really like these shoes for stunting or choreography. The sole was rounded I'm a way that made my feet roll from side to side and caused me, and my friends, to stand only on the outsides of our feet.
And at the current moment I have the Nfinity Titans, which i LOVE. They are light but sturdy like the evolutions but since they are high- tops they give me ALOT of ankle- support, something I really appreciate while tumbling. I don't have a problem with not being able to point my feet, and I would love to base this shoe! However, if I was a backstop with small hands I don't know if I would be able to get a good grip around the flyer's ankles or not.