But the cost would be taken up not having to buy a travel cot and moses basket, and/or crib. ( not that everyone has to buy those anyway) It is very portable by the sounds of it, and if it does last up to 12 months, which it looks big enough to, and you can get a heavy duty spring for heavier babies, it should last the 12 months, unlike many of the other things that say they last up to such and such an age but don't go anywhere near!
I think it is a good idea I was worried when I first saw it thinking of the baby trying to stand up in it and toppling it over, but it would be like an adult trying to stand up on a hammock, not possible!