I’ve found it to be unreliable. Last summer, we were in Tokelau. Checked the app, showed all 3 washers open mid -afternoon. Gathered my laundry and went over. Not only were all 3 washers in use, there were people waiting. Checked the app again, all showing available. One woman told me they are always busy. I didn’t want to stand in the hot laundry room waiting, I decided to check the pay laundry by the bus stop. No one there, no machines in use. It was $3 each, I went ahead and paid it to get it done.
Another time we were at BWV and put my laundry in the washer. Got back to the room and checked the app, it showed the machine I was using as available. I thought maybe it stopped, so I went back down. It was running.