I have been using Fiasp in an Omnipod since April 2017, which is almost 3 years. Wow! Time flies.
I found it worked better than Humalog. It is a lot faster acting for me and continues to be fast. I used to inject humalog like 45 minutes before a meal. With Fiasp it is more like 15 minutes early.
I have never compared to novolog/novorapid so I have no idea how they compare.
I get no stinging on injections. My pump sites are fine. I have no reason to stop using it.