Perfect lightweight manual wheelchair for traveling, especially in the airport. In order to put a manual wheelchair in the airplane cabin close where you are sitting will require a light weight wheelchair. Cabin is not guaranteed to be available for use. Otherwise the wheelchair must go into the cargo below. If a wheelchair is put in the cargo section you would need terminal transport for assistance to take you to your destiny either to another gate or the final luggage pick up and wait for your wheelchair. If you have a lightweight manual wheelchair it will most likely be able to be put in the cabin closet. If you need a leg lift for your personal condition this wheel chair works perfectly. The leg lift is adjustable. It's great if you need to keep your leg up during wait times or down to rest. It's easy to use if you do exactly what the wheelchair instructions say. If you want to use the transport service at the airport the transporters are all certified in transporting you in your K4. You will need to contact your specific airline to get assistance ahead of time for transport service. I highly recommend the transporter if someone who is with you is not familiar with transporting. Some maneuvers such as going in and out of an elevator can be tricky without the knowledge of how to maneuver as the wheels can get stuck. It's not a defect of the wheelchair, it is a non-familiar knowledge of how not to make the wheels get stuck. It is a smooth transition if you have someone who pushes you who knows how to. Going straight or a slight curve is easy to do for the novice. I highly recommend that whoever you personally have to push your wheelchair for you look online on how to make the transitions and turns smooth. Travel distance can be a very long walk so having a lightweight wheel chair makes the transport much easier then the heavier classic models. The wheelchair is lighter than most manual wheelchairs and it makes it easier to put in and out of a car if need be. It does take up a good amount of cargo car space even after the leg lifts are taken off. The width of the K4 model is great when you need to condense space. The leg lifts are easy to take off once you understand how the mechanism works. The leg lift has to be turned all the way out, then it gets lifted up easily on the MDS806565E K4 Basic model. If while transporting the soft calf can be moved to the side if need be for more comfort. The foot rest will still be attached, however, the soft calf pads are optional for use. You can still use the foot rests even if the calf rests are not being used. If you want a greater space for sitting and storage for a purse, blanket or any other small items I recommend looking into purchasing the next size up wider seat from what will actually fit you normally. It's well worth the extra up-charge for the extra space. I also recommend looking for a seat pad to place on the seat for more comfort while traveling or long periods of sitting. There are many to choose from for personal preference that can be purchased separately from various companies here on Amazon. We only needed this wheelchair for short term. However it was well worth the cost over renting or replacement cost if the rental would have gotten lost or damaged in traveling. The price and quality of the Medline K4 is fabulous. The Medline company has been around for many years , and has an excellent customer service, They were contacted before and after the purchase of our K4, and they were very helpful.