Loved that not every single popsicle row had to be filled. I've had that problem with the other two experience-collections, and missed both times because of it. Also liked that you got a different popsicle every time--that no two collectings filled the same spot.
My only possible issue is that there's still four rows that could need to be completed. Is there a discount for buying the item with RC, should you miss by one popsicle on each row? And I only barely got it with an upgraded Dessert Shop. Had I not upgraded, I highly doubt I would've gotten it. Which makes it slightly unfair to those who don't upgrade until all their machines are completed.
To correct that, perhaps use less popsicles (or whatever the item is next time) in each row, or maybe one row less.
Other than that, it was good. A good challenge, for all that it seemed for a while I wasn't gonna make it. So thanks for a good fun time.