Fairly quick painting due to the color palette. I had one color that was problematic in that over half of the bag had rounded bottoms. I also had issues with using a ruler. 140 would work for portions but then wouldn't. Not an issue I've had with other rounds I've completed. Checked with 141, 140.5, and 139 and 140 was the closest fit. Besides those inconveniences, it was still a fun painting to complete.