Spectra and Sekonic meters are standard on most sets. You really want incident for metering at the subject and then checking ratios. Some people like to carry a card and use the reflective mode. I've never had the time to mess with this on any set where a camera was present.
However, lighting for ILM, we would use it for pre-lighting on-set prior to the VistaVisions arriving because the background plate illumination ratios were so critical.
Just know that the Standard was designed when slide-rules were the way people did things before the advent of computers.
There is a curve to learning it and there are "discs" that you must change depending on your application. Contrast this with the second and third one, which most operators can pick up and get readings on in moments.
A friend of mine has the L-758 Sekonic and noticed his spot readings were all over the place and another DP friend of his said he was having the same issues with the same meter.