@godismyprovider We're on week two and she is consistently using "outside", "snack" (for I need food OR the cat is eating my food!), "ball" when she wants fetch, "belly rub" and "butt" for scratches, "play " for tug-of-war, "brushies" for brushies,
"puzzle" for when her puzzle is out of food. We're still working on naming ourselves, the cats, things like dog park, walk, park, etc. We're wanting to go slowly so every few days once she understands something I put another one down.
She consistently uses the above when she specifically wants the things they represent.
She also knows they get our attention; she starts to use them and I get up and do the thing. Later on we will be learning "later" and "no".
We started with the bells on the door when she was little, so she could signal that she needed out. We replaced the bell with an outside button and she peed inside twice before understanding that she needed to press that to get the door opened for her. After that it was a day before she started using her "snack" button (we call meals snacks), then two days later she started to intermittently press the scratchies and brushies button. The next day it was ball. The day after she started understanding puzzle would get her puzzle refilled or put on the floor for her to use.
It's fast, the difficult thing right now is the balance between teaching her that these are for her to speak, not to get attention, but as I said before we'll probably start working on that next month.
All of this is with my enforcing it. When she presses them when my husband is home he opens the door but does not stop working to do the others, though he repeats them to her when she presses them, so I don't think household consistency is even required.