New to PHP and Yii I started building this eCommerce site Feb 20th and had it in production on May 29th 2012. Added many new features since then but yii, yii extensions, and this forum has made development of this fast, simple, reliable, and also a pleasure!
So far in 3 school supply selling seasons we have over 105,000 orders and revenues of > $7.75M
Check it out here, better yet, order your kids school supplies!