If you have a choice, or have important editing work to do: I would recommend to wait until the first patch has arrived.
Look at the forum so far, a number of questions about behavior, some -it must be said- due to the changes and simplifications in the UI, others were clearly waiting for the wider audience testing.
So far working with 19 after a ca 9 hours download period, I have experienced a number of program crashes, some even without PD to catch the error and allow reporting... (I have reported those back to CL with error information retrieved from system level).
Having said that, my general impression is that the program works fairly well.