Sadly, this plugin didn't work as expected with variation plugins under certain circumstances. And I couldn't wait any longer for bug fixes.
I had to buy another plugin, and re-setup eshop all over again. The other plugin did the work as expected (it looked a lot uglier out-of-the-box but it worked as expected).
I had to spend double the money and time in the end.

It's still a good plugin, but it lacked an essential compatibility with "Any" variations.

Also, what is a bit concerning is that I saw some reviews get deleted and the overall 5 star rating was always suspicious to me. No one can be that perfect. It's a free market and you got to get used to some negative reviews. Either fair or unfair. I'm sure that a regular buyer will differentiate between a review that's just complaining about everything and someone who has legit troubles with the product.