HSZR

A very unique hole, one of my favorites.
The internal texture grips very snugly and provides a ton of stimulation.
This means that the thickness of your lubricant changes the sensation significantly, letting you customize the experience.

However, it's definitely not for everyone.
If you have a sensitive head or just don't like "hard" onas, you will not like this.

Also if you are on the larger side, trying to fully insert will stretch it and likely damage it over time.
The actual texture doesn't start until a bit deeper in hole, which means the base of your shaft gets almost no action.
The overall experience is still spectacular (in my opinion), but I think it's worth pointing out since this may be a deal breaker for some.

Despite all the caveats, I'm still giving it 5*
It's not for everyone, but it's extremely good at its niche.

Picked this up because of the box art.
It's pleasant, not super stimulating but that might be my preference.
The 800g construction is quite hefty, and it can actually accomodate somewhat larger sizes more comfortably.
The dual-layer design results in a hole that's firm enough to maintain its form while staying soft inside.
The main issue is cleaning. The small enterance, bends, and final cavity are a pain to clean properly.

Overall, I feel like a rating of about 4* is appropriate.
Not extraordinary, but a solid choice given the tradeoffs.