All Stairlifts are wonderful pieces of engineering, but being electro-mechanical they always do run the chance of occasionally going on stop.
Anyone that tells you otherwise are simply lying. This is why, customer service is ever so important. In the event of failure, us at Ability Assist will go out of our way, 24hrs a day, 7 days a week, 365 days a year to ensure that we do our best to keep you moving