I am an embroiderer, digitiser and quilter, and personally wouldn't shell out that much money for something as simple as this. I noticed there was no video of flying geese, but on the whole making any of these blocks would take so much more time. You have to re-hoop with stabiliser - more time and expense.
What brand of machine do you have, what is your hoop size, and does it not have a feature where you can resize and stitch out a square? I think the advert says all designs are in 15 sizes, how many will/can you use?
The 1/2 sq triangles will have sides on the bias, and they all still have to be trimmed to measure.
Most of us would be more productive using the old fashioned methods.
Do pm me if you would like more help.