About 5 years ago, I was diagnosed with lung cancer. I was among the fortunate as it was caught at stage 1! Rare and fortunate! I have now passed 5 years of no return. It left me with diminished breathing capability due to removal of 1/3 of my right lung. I am a consulting engineer who travels everywhere. This left me with a serious problem when it involves big airports, high altitudes or lots of walking. The solution turned out to be the Solax Transformer. What a huge help! I can now travel anywhere or cover any space using this compact, self-folding scooter. The airlines carry it for free and it goes with me everywhere. Disney World (huge) NO PROBLEM. I drive it right to the plane or cruise ship and it is there when I need it. It is one of the best investments with the greatest return in comfortable mobility. Can't recommend it highly enough and their service is excellent and reasonable. Great product!!