How to set up production hotkeys?

Cycle hotkeys select building and center screen at it. I think they were used in Voobly times when unit queueing worked in different way.

Should I use them or just use control groups with production buildings of each type?

When multiple buildings are selected you can't see unit progress bar. Is it better to rely on progress shown in top-left corner or to hotkey one building of each type to check progress bar? You want to create each unit as late as possible.