While I'm sure it is a great template and CSS is definitely the preferred method for web site design, using a pure CSS template will cause major problems for upgrades/add-ons since X-Cart is table-based. You would need to patch/upgrade each template manually, and many add-ons would need to be also done manually. Until X-Cart 4.1 becomes 'stable' I don't think you will find too many people who want to cause more headaches then they will already have trying to keep up with the patches
