We have been using Numinix to support our heavily modified Zen Cart application for a number of years now. When it came time for a complete refresh of our entire website, they were our first and only call.
We were guided through a complete and comprehensive statement of our design goals. Once this was completed, we then received mockups of how the various pages of the website would look.
We also needed our site to perform in ways that the Zen Cart application did not support. We created a complete product selection and navigation method that allows the user to narrow searches to exactly what they are looking for. There were also many smaller changes we needed and Numinix always came up with a satisfactory solution.
We are extremely pleased with Numinix as our choice for this major project. Numinix was professional and completely engaged in our project. The only reason they did not get five stars was that there were some communication issues that caused some cost surprises.
I would be happy to recommend Numinix for any Zen Cart based project, big or small.