After the first try, it was rather a neutral experience. For the optics, the shirt does nothing. With 190cm 84kg size at my problem lies rather in a somewhat unfavorable fat distribution toward stomach. Here the shirt conceals rather little.
The true size of the shirt showed up after a few hours: It is no longer tired, no backache, beautiful posture. The big hit with long standing activities such as operating. If the shirt does not easily give up for this reason.