Not quite as good as a normal masturbator and the material is also of a kind of hardness I usually can't enjoy for long. But as a travel utensil or as a quick fap it's ok. The low price also means it's no big loss if you don't like it after 2-3 times.
We talk there about a really small onahole that will fit into any pocket.
Just using a good amount of spit or hot water will do the job, for outside masturbation.
The structure may be strange at first, but I quite liked it.
Way worth the price, as I already said.
This one has just the right structure inside, a simple and delicate twist and provides a rather decent stimulation to your head. The stimulation could be strong for some, as it was for me, but this is indeed better than the Chu! 4 in some ways.