Hello,
Sadly, this doesn't seem to work as intended right now.
When you use, for example, total memory for a whole cluster, data given is in KB (let's take and example : 1 024 000 000 KB).
When you ask for it to be shown in TB, it shows.... 1 024 000 000 TB (which is cool, my cluster is now godly).
Problems aren't only here, when you use supermetrics, sometimes you can't even show a unit, plain and simple. You can try to put what you want, it won't print it.
To make it short : there is a bug imho here, I have several open cases with VMware and this is one of them (not the most painful one by a long shot), easy to workaround, just create a supermetric that explains the unit in the label, end of story. For exemple, when you need to show GB in place of KB, just do a /pow(1024,2) and trick is done. Just name your supermetric with the resulting unit or nested supermetrics can become a nightmare to maintain.
Sad but true...
Regards