Magical! I loved it, nothing like classic snorkels, it doesn’t hold water when you dive! It really is ultra dry. It took the snorkeling experience to another level, by far!! It has a system at the outlet that automatically seals it as soon as it goes into the water, and as soon as you come back to the surface you breathe immediately, with a clear tube. And if sometimes it doesn’t work perfectly and takes in a little water, which happens rarely, the water comes out very easily by blowing from the mouth while pressing the button of this system at the outlet upward.
Its mouthpiece is a little different from my mouth, I would like it a little more elongated/wide. And as another user said, it tends to pull a bit to come out of the mouth, and it wants a little more biting. It is flexible, but the flexible silicone part has volume and that makes it not completely soft.
Overall it has more bulk than the classic ones, its tube is oval in cross-section, it is large.
Note, it is made one-sided, so it is meant to be worn only on the left. I was used to wearing them on the right, but it didn’t bother me. I put it on the right as well and didn’t see any issue in its function, but visually, its lower valve looks strange if you don’t wear it on the left.
Also, because it is thicker than the classic ones, there’s no way you can support it through the mask strap, it’s very uncomfortable that way. But the clip that holds it to the mask strap externally is very good and stable, and it sits just fine.
Despite the slight pull, I had no problem, and this trick

Suitable for spearfishing.
Completely silent during the dive.
It has a system that does not require you to manually remove the water that remains inside the chamber, like in older models. As soon as you reach the surface, you take a breath and you're ready.
In terms of quality, it is quite good, I have not found any material defects. Of course, we take care not to throw it away or leave it exposed to the sun with the saltwater, and always rinse it when we return home.
The prices are generally high, unfortunately, but at least you are paying for something very reliable and functional.
Do not buy it if you only plan to use it for two dives and then stop.
On the other hand, if you have someone who is generally afraid of masks and does not want to drink water, etc., I consider this to be the suitable purchase. However, if they learn with this one and then switch to a regular one, they will drown.
They will have gotten used to a system that automatically removes the water. So, be very careful.
I hope I helped you