I love my Ex ‘n Flex 300. I purchased it about ten years ago when having increasing difficulty walking owing to quad myopathy.
I’ve been using it for an hour/day all that time, and feel that exercise is what keeps me going. I take it everywhere, even on cruise ships.
Five years ago, in New Zealand, we plugged it in and it fizzed out with the 240 volt current. Amazingly, there was a unit available near Auckland, and it was delivered to me by the brother of the Ex n Flex inventor. Great customer service always!