I used this bag for travel by air, car, and train. We found it to be well-constructed, simple, and durable. There are handles where you need them, and the shoulder strap works fine and can be quickly tucked away inside a small front pouch when checking the bag (very helpful for avoiding straps catching in baggage-handling equipment). The top zips completely open for full access to the interior. We bought the large size bag -- dimensions are approx. 30" long x 18" wide x 14" high. Because of it's convenient design, we were able to fit several bulky, boxed items in the bag comfortably. It was the only bag of the 6 large luggage bags we brought that could fit these items.

The bag folds for storage into a small carrying case that can also double as a personal toiletry bag or similar.

It's not constructed of the thickest material, but we found that it was more than strong enough for our travels, and because it's not super-thick material, the bag is very lightweight.