outstanding for the price. i like the non slip on the top. this is great for the price. yeah you have to blow 40 or so times, its great exercise for your lungs, it is also bulkier and weigh more than the advance stuff, but it is very tough and grow some legs if you think it's heavy. i use it at home to lay around on, in the field camping on a tent and also use it with AMOK hammock. just the price alone and toughness. 5 stars easy