Cartthrob was a perfect fit for our most recent ExpressionEngine site for Evoke Dvelopment. Instead of just having a store with products, we were able to relate products and services and vice-versa. For example, if a visitor was looking at one of the many business workshops Evoke provides, we pulled in the accompanying product material. If the visitor was looking at a specific product and wanted to forgo the instructor led workshop, we pulled related products from that workshop.

In the past we have used Magento and ExpressionEngine together but the flexibility of Carthtrob was far superior. Not to mention a lot easier for the client to easily update their products using ExpressionEngine. Bravo to the Cartthrob team for making a product that fits the power of ExpressionEngine. We now have a go-to for ecommerce using EE.

Example of a workshop with related products (in right nav)
http://evokedevelopment.com/workshops/building-relationships/adventures-in-attitudes

Example product page for same workshop
http://evokedevelopment.com/products/building-relationships/adventures-in-attitudes