I purchased several small bags for a trip to Aruba this summer for our family.  This bag was my daughter's choice.  I was leery due to the cheap price.  The other bags we brought were higher end products.  It worked out just fine, the first part of our trip, it was tagged and shipped through to our final destination.  The bag did fine through luggage. On the way home, we carried it all the way through and it worked well in the overheads and getting around the airport. The handle was made cheaply, and might not hold up as long as our other bags.
My daughter fit all her clothes into the larger bag.  I grabbed the small one at the last minute to use for our excursions. It worked really well. The shoulder strap was comfortable.  The outside pocket worked well for things we needed to grab quickly, like camera, walkie talkies, jewelry, or wallets. We used it for the beach, a scuba excursion, and even when we went to dinner.  Someone always had something to throw into it.  People commented on the small size in several reviews, which it is.  We had a washing machine in our suite and we were able to pack light for the 8 days we were there.  It holds about 5 days of clothing, and 4 bathing suits.