Awesome
2nd Place Solutions of the Kaggle Competition: Santander Product Recommendation
The article on my blog explains the details of the approach.
Detailed instructions on how to use the logic to make submissions are provided in Instructions Santander Product Recommendation.pdf
This <a href="https://www.kaggle.com/c/santander-product-recommendation/forums/t/26824/2nd-place-solution" target="_blank">thread</a> on the Kaggle forum discusses the solution on a higher level and is a good place to start if you participated in the challenge.