After the three days said I had a fear that I had to make an effort enormously to elicit all the air again. The valve can be completely open, however, so that it was possible to get shut the air within a minute addition. I could not detect any holes, cracks or the like, so I did it again to take home to use it here. I highly recommend this airbed anyone who values comfort at a fair price.
One more thing for the supply:
I had ordered the airbed Saturday night and had initially feared that it would no longer come to Thursday, the day of my departure, on time. Everything went smoothly, however, Tuesday afternoon has come the package! So :-) Better it could not walk!