I use it every day. We have the fancy motorized ones with preset heights at my job, so I do alternate between sitting and standing but I probably do at least 3-

I use it every day. We have the fancy motorized ones with preset heights at my job, so I do alternate between sitting and standing but I probably do at least 3-6 hours of standing per work day. I have never had any problems concentrating—once I actually get focussed, I completely stop noticing that I'm standing.