Impressive suction let down by an otherwise inferior hole.
First of all, the suction effect, while very strong, is not executed all that well. I am not entirely sure why, it is too intense and the feeling of the tunnel does not match well with the suction, likely because the void space is too large. The entrance to the tunnel is too firm in my opinion, and a circular hole rather than an oval or slit is invariably a negative in my experience. For those who want a strong suction effect, this might be a good shout for you. But only if you understand it may be disappointing beyond it's vacuum effect.
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