Purchased a InogenOne G5 oxygen concentrator about 6 weeks ago for my Dad, who is on long term oxygen therapy for a chronic lung disease. This is the best thing we have invested in as it’s given my Dad some independence to get out and about without worrying that the oxygen from the ambulatory cylinder will run out as they were not lasting for too long. The advisor (Lee) I spoke to was great and supportive with the advice he gave to which machine would be good for my Dad’s needs. My Dad gets out a bit more now and drives around in town with his new machine whilst he is able to charge it in the car. The oxygen concentrator can be taken abroad as most major airlines are accepting them on board = winner