Like the similar listings for this brand, it can be a bit deceptive on how many you're getting (its one and it will always be one) which is unfortunate for the price they're set at. But, if you can buy it on a sale, I would definitely recommend.
At this size, you definitely need two hands on it, one to hold it to your body and they other to twist. The twist mechanism is a little stiff, but it is definitely necessary with its size. The suction is really strong, but also comfortable, and its not to hard to break the suction if/when you need to.
All in all, its good, definitely recommend.
Even more fun than expected.
GratefulBear - 20 Sep, 2021
These things are great and really really hit the mark. We went slow at first to check they weren't bruising but they're deceptively injury/bruise free given the sensations produced. I had a slight issue in that i thought i was ordering a pair based on the thumbnail but it was only a single unit so do make sure you read the listing. Quality is great, attractive and nice in the hand and they maintain a good seal. I sized these based on the area they were to cover but one thing i've learnt after getting a pair of the smaller 2.5cm versions (also great) is that with the larger ones the sensation can be pushed further as there is simply a higher volume inside allowing for a greater vacuum so don't rule the larger ones out just due to size.