When best practices are followed during the design phase and when you deal with a very experienced manufacturer, this combination will produce great ergonomics. Here are some considerations.
The depth of the chambers is usually 600-650 mm, so that an average person arm can reach the back wall, and the height of the gloves is between 1250-1300 mm from the ground.
In the early phases of the project, a wooden model should be used to simulate and test all the working procedures.
Can all critical internal areas can be reached easily? Does the design accommodate for a heavy bag be safely dragged between 2 chambers?
An elliptical shape and good placement of the glove flanges will also greatly help reach all the critical areas during the process.
Finally a small incline of the glass will greatly help ergonomics and will give a better view.