Communication with Mason was ok, and I was grateful that he was able to provide time code equipment at late notice. However, the Comteks provided did not work, and the director was not able to hear actors through the headsets. I would use again but probably check equipment in advance and ask for a swap in case of issues.
Mason was great to work with! Super open to talking with me about the Shure SLX-Ds I rented from him, and he was very communicative about pickup/drop-off info.