CrazyLister templates gave a significant and much appreciated boost to the STR and sales of my eBay listings.
There's a bit of a learning curve for creating them, but it's not overwhelming. Instructions are clear and plentiful. You can start with their multitude of templates or create your own.
The most remarkable value of the CrazyLister Company is their technical support. These guys, Din, Ofer and others, have your back and are there to help you succeed. I've never experienced better support in all my years on the web.