Took a lot of effort to inflate it (as I forgot to take a pump with me), but my daughter and her friends love it.  Only thing to be careful of is that the string surrounding it stretches as it gets wet and can get caught on things.  However I think that we will be ordering more of these as gifts.

So far, this tube has been great!  It is big enough for 2 or 3 grandkids to fit in the middle.  It has a rope they can hang on to.    They best thing is it has not lost air as many ot  these cheap China junk blow-up toys do.