Recommended. I used this site a few years ago to educate my self in the algorithms needed for a collaborative filtering project. The project was a success because the clients that deployed it got an immediate 30-40% increase in sales.

This site is amazing. What a great find! I've been doing research in the machine learning field using Bishop's PRML book. As good as that book is, I feel there is a lack of good tutorials to explain important concepts. The few tutorials I read on this site were clear,concise, and relevant. It's important to get that scientific reasoning element as well since the interpretation of the data munging is often the most difficult part.