HSZR

The contrasting textures make it good for edging.
You can do partial strokes for light stimulation or fully insert for more intensity.
The only thing that's slightly tricky is that the hard section is much harder to penetrate - but if you hold it by the hard section you shouldn't have any issues.
Very good quality for the price point.

Through-hole design is mixed blessing.
Definitely easier to clean than closed-hole, but nothing to stop stuff from coming out the other-end while in use.
While marketed as a 2-in-1, the two different holes weren't really distinct.
It was tight, but sensations were not especially interesting.

Overall not for me

Ended up picking this up because of the free-gift coupon.
It's quite hard and very stimulating, has a good length, and on the cheaper side.

IMO, it's almost like a beginner-friendly Umi no Ana 2 Carnivorous Mermaid.
The Longitudinal Fold Spiral Plus is much less tight & intense, but the hardness & rough suction are basically less intense versions of the sensations you'd get on the shark.

If you're looking to experiment with hard/intense onaholes and the Carnivorous Mermaid reviews scared you away, this is a decent one to start with.

Love the art on this one.
Fairly soft, but still has a bit of structure to it so not overly floppy.
Definitely more on the stimulating side, but nothing too crazy.

Unfortunately, mine did come with a slightly misaligned tunnel.
It's still good, but I do think that brings it down to 4*

Think I just got unlucky here - I likely will be trying out the soft version when it comes out since CooLP does seem to put out good products in my experience.

Was curious and gave this a try.
Personally felt it the sensation was a bit mediocre compared to other onas, and the short length was more of a problem given the through-hole design.
Through-hole makes washing easier, but also means you have to be careful nothing spills out during use.
That said, this is a fairly low price-point product so I'm hesitant to grade it too harshly. So I'm rounding up to a 4*