First of all, dimensions, the length is mentioned in the description as 12 and has a maximum diameter of 5.3, which makes it a game for experienced users. The surface feels smooth and soft, while the silicone remains quite hard, more than I expected. Nevertheless, it remains very comfortable, to the point where I went for a run without any problems. In fact, in such cases, the ball inside shows its capabilities, with very pleasant vibrations which, however, naturally do not reach the level of a motorized game. The only possibly negative aspect is that after insertion, it returns to a very small (relatively) size, which means that if you wear it for a long time and "get used to it," the extraction can become painful, especially since it can only be used with water-based lubricants, which dry faster. The suction cup on the base is very strong, no complaints here. As for the quality of the materials and durability over time, I don't have an opinion yet as I have only had it for a month, but if I don't make an edit to update, it means that it is of good quality.