Anna plays the new puzzles as they come out and I play from the archives. I have completed May and April 2019 and almost completed March 2019.
For Monday and Tuesday I can usually finish the puzzle after revealing 1 to 5 squares that stump me. For all the other weekdays I play with autocheck on, which helps a lot because I can guess. Then I still usually have to reveal ~5 squares, and often more on harder Friday puzzles. I often play in the evening when I have had a few drinks or in bed while falling asleep so not when my mind is the sharpest.
There is one annoying bug: with autocheck on, if you put in the first character of a rebus square there is no way to change it. Say the correct rebus is SALT and I type an S in the square. Now there is no way to change that square to SALT, because it counts the S as a correct answer.
Overall I have gotten a lot of enjoyment from this app. It is pricey though!