La Mujer tiene pelo largo
The speaking portion or Rosetta Stone is paradoxically the most confusing and yet may be the part that reinforces the most learning. I don't know what the measurement is since you can say the wrong words yet still get a good rating. And sometimes it seems to be where you hold the microphone determines how well you do rather than how you speak.
The net result is you really work at pronouncing every syllable.
My study from so many years ago got me through Unit I fairly easily, so I did the entire unit in one day. But it took almost 2½ to 3 hours to make it all the way through.
There are 8 units in Level 1 and 9 in Level 2 which is all I bought, so it may take a while for me to work my way through. 17 units at one a week means about 6 months if I am really diligent and can absorb a unit each week, which may NOT be the case so it may be a year or two.
Maybe somebody will magically find the Level III and send it to me, but for now I think the application does seem to have enough to keep me busy for a while.