so far so good!
I've only had the unit for less than a month, but we are using it every day. Love how it just works, is quiet, and fits under our standing desk. I hope a new interface for it could become available someday as I think the data it collects could be fun and more interesting. I'd love to have support for multiple users where it could keep track of steps and mileage per day, per month or some other duration, and other interesting stats.