pros: a really interesting mechanic and a good product for the price. Gave my partner and me a new experience. Only used a few times but it is very soft and elastic, we will use it many more times. Once you get used to its gimmick, it's very fun and exciting :)
cons: Hard to dry the inside (which is not ideal for safety and hygiene) unless there is a fan underneath it airing it out. The outside is a frosted kind of plastic, but by using the product, it can collect lint easily and show cracks and scrapes in the plastic outside easily. The entrance to the toy is the same amount of soft as the rest of the toy, and my partner is of average size, so when using the toy, the soft outer edge can awkwardly roll into itself unless super lubed up, which is a bit messier than we wanted to deal with, but it was funny for a lighthearted laugh when I had to pry my finger under the toy and pull out the edge from inside the toy. The toy also works primarily with the suction formed from having no air in it, so if you do happen to accidentally let air in, it will make quite silly noises and you'll have to squeeze the top to release air again.
