The size was perfect. I was able to pack four days of ...
591698
The size was perfect. I was able to pack four days of clothes (including 2 pairs of shoes) with ease. I think I am going to get the tote.
***One year later, while I still love the bag, buyers should note that the shoulder strap broke after the first use. I noticed that another buyer had the same experience.
1378317
I purchased the 20L bag to put towels, a change of clothes, shoes and a jacket.  It was the perfect size.  On the way back from the dive, the seas were really rough...we felt wetter in the boat than under the water!  We, and the Earth Pak, were constantly drenched by the waves for at least 30 minutes. Everything inside stayed perfectly dry.  I'm very pleased.
3148411
The perfect size for a two week trip for one person. Took it to the UK this summer and needed a case big enough for two suits and many clothes. This was perfect. Very comfortable to push around with the well made cushioned handle and superior smooth-rolling wheels. The included garment bag is a plus, as is the TSA lock which worked perfectly for me, and it has all the right compartments. As another reviewer said; if this isn't big enough, you should probably stay home!
1937093
I was able to pack a week and a half worth of clothes, my tens machine, small toiletries, and use the two top pockets for dirty clothes separation.  It was the perfect item. NOTICE: I would not put fragile items in this if you are checking this bag.  I was able to do carry-on for 3 flights out of 4.  Air France was the pickiest about it being a smidgen over the 12kg weight.  It was 13kg and they pitched a fit, so I had to go back and check it in.
4272253
Perfect size for a carryon and can house a couple days worth of clothing.  Rolls very easily.  The suit bag feature is a nice thought, but doesn't execute very well, som ironing is always needed.

I travel about 3 times a month and this has fit fine in Delta bins.  Have my experienced the 'tipping' that other posters have noted, but I don't typically use the front pockets, as this typically makes the bag too large to fit into the overhead.
3092035
The perfect size, it's exactly what I was looking for,  a packable go to backpack.  I am very happy with my purchase.
575143
These were perfect for me for a road trip over the holidays with a couple of other people (who used medium to large suitcases), a whole bunch of gifts, and very limited cargo space. I used these as stand-alone bags, and it worked perfectly to slip them into the small spaces in the back of the vehicle. The large container held two pairs of jeans, four short-sleeved and one long-sleeved T-shirts, and a pair of sneakers snugly. The smaller sizes were perfect for undergarments and toiletries. I only ended up using three out of the six for a five-day trip and was able to take everything I needed.
4252151
I am converted to using packing cubes after using these for 5 weeks in Asia. They were the perfect size (I might buy 2 more individual ones, just because I want EVERYTHING in a packing cube after using these). The medium ones are great for normal clothes and the narrow ones are good for several things: socks and underwear, beach clothes, carry on clothes just in case, or 2 days outfits when changing hotels quickly. The large one is really big, but I used it for all my extra toiletries for the month. I don't know what I would use it for otherwise, unless in winter (I had no big clothes). These were nice and lightweight and kept me organized as I traveled from place to place!
4241657
I bought this pack for a 4-day backpacking trip to Havasupai.

Im 50 and I was able to adjust perfectly for best comfortability. The mesh cushions on the back area, shoulder straps and waist belt were comfortable and made the 27lbs feel light on my back.

I was able to fit 4-days worth of clothing, dry food and 3.5L of water, downbag, sleeping pad, water shoes, emergency kit, sunscreen, shampoo, conditioner, toothbrush/toothpaste, snacks, portable charger, trekking poles, tent sticks, portable stove, flashlight and 32 oz. water bottle. Also comes with a neon yellow waterproof cover attached to the bottom of the pack where I also stuffed my rain poncho.

Carabiners and bungees definitely came in handy.

I only wasn't able to fit my entire backpacking tent, which my friend was able to fit in pack.

Overall, this pack held up very well and surprisingly comfortable. For the quality and price, I definitely recommend this product.
4483683
Backpack is perfect size, not too large or small. I bought the S/M size one and as a 5'4" female, I found that the backpack fits very well and is comfortable. The travel day pack is a nice size, it is a touch small for me, but it would hold enough for a day hike. The day pack also is large enough and has a sleeve for a laptop.
578961
I have used this bag for about a month. It seems to be durable and isn't falling apart or showing signs of wear and tear. The size is perfect for me. I don't have to constantly try to get everything to fit in. The pocket on the side expands and fits my tennis shoes so I don't have to put them in the main compartment. There aren't any pockets on the inside which is what I prefer.

Overall a great bag that I anticipate being able to use for a long time.
4034002
The size is perfect for me. It holds an A4 paper perfectly. I can reach every thing inside this bag super easily so no need for guessing where I might find something in it. The material is good. The zippers are smooth. It
1319155
This bag was great. I was able to fit all my photo gear and clothing for 4-5 days while fitting itself no problem into the overheads.

In terms of gear storage, I had a DSLR body, 50mm, two medium-size telephoto lenses, and a 400mm zoom lens + extender - all fit no problem. There was space in the sectioned body left over for chargers, cables, etc, and all the underwear and socks you'd need for a short trip. In the rest of the main compartment I was able to fit several shirts and shorts. The bag fit in the overhead compartments of multiple regional US and Delta flights with room to spare, even with a tripod attached to the side.
2044851
My sister and I both bought this backpack to travel for over 2 weeks in Europe. It was a perfect size, and held up well. The only drawback was it didn't have a hip strap to help with the weight. We only had around 13# total, but I found myself trying to hold the pack off of my shoulders a lot while walking between the train station and our airbnb or hotel. We used travel cubes to help with our organizing since it only opens from the top. For the price it was worth it, if I had more money to spend I would have bought one with the hip support.
3764129
Perfect size for a airplane personal! I used it on a Spirit airlines flight that charges for larger carry one. It was the perfect size and fit all of my belongings for a 4 day weekend.
1985129
I was looking for a small bag to use while boating that would hold my (large) phone, sunglasses, lipstick as well as ID, credit cards and cash. After much searching for just the right bag I purchased this one for my boating vacation. The size was perfect for my needs and the card holder with zippered closure for loose change worked perfectly plus the long cross body strap was handy . The card holder fits in the outside pocket as well as inside the main compartment which zips closed. I kept it in the main compartment and used the outside pocket for my large Samsung Edge phone. The only problem was after just 4 days of use the small loop sewn on the side that holds the metal ring for the strap broke loose. There simply wasn't adequate stitching to securely hold the loop considering the weight of the bag. Since I was away from home and without resources I had to make a small hole in the faux leather above the loop to attach the strap hook to. Fortunately it was still usable and I may be able to come up with a better fix.
703249
This bag was amazing! I purchased it for a 3 week trip to Europe - I was able to fit my laptop, all my clothes, and toiletries, though I did have to pack quite strategically haha. But it was perfect and waterproof and really fit my needs.