I have both a folding mobility scooter and a lightweight electric wheelchair. I use the latter when i need to travel on any sort of public transport. This will go on buses, trains, London underground, etc.
Do feel safer on my pavement mobility scooter and use that around town. For days outings with my daughter, she feels it is actually easier to take apart the scooter and putting that in her car boot, than the wheelchair which does fold to about the size of a large suitcase, but is then heavy to pick up
I am looking to purchase a lift mechanism for her car boot so she will not have to do any more lifting.
The only problem I have with the wheelchair is when I am using it go away for a few days. I am very independent, and happy to travel, etc by myself (with Passenger Assistance on trains), but there is no way I can also manage any sort of suitcase, so all I can take with me has to be in the bag on the back of this wheelchair.