I really like it. I doubt it's better than fluoride for caries prevention, just the same. But I do think it's better than Sensodyne for reducing temperature sensitivity.
My anecdotal theory is that HPA must fill in micro gaps like Sensodyne to reduce sensitivity without yellowing my teeth.
The HPA toothpastes also typically don't have SLS or as many irritating Ingredients like mint. I have fun flavours like orange, clove, or cinnamon. Mint is highly irritating, and I have noticed that since removing minty pastes, my lips don't dry as much, and I need less lip chap. My gums and cheeks are less irritated too. It almost feels like a conspiracy that most brand-name toothpastes contain something as irritating as mint just to sell more lip chap.
Lots of HPA toothpastes also use xylitol. Which can make the bacteria in your mouth lose the ability to create acids and adhere to your teeth over time. Your mouth stays cleaner longer and is less likely to feel "fuzzy".
So I think the HPA toothpastes are more improved by what they don't have, irritants, and use more modern ingredients than traditional toothpastes. For me it results in teeth that stay cleaner and smooth longer, fun flavours, low irritation and reducing sensitivity.
I've tried Remin, David's, and a few others I can't remember.