We bought Bulk Variations Manager for our client who sells highly customizable ergonomic chairs. The plugin was really fast generating the multiple attributes and variations for these chairs. Additionally the StoreApps support was great as there was some compatibilty issue between the plugin and our database configuration. The staff at StoreApps quickly found a work around. I highly recommend this plugin if you need to manage products with multiple attributes and variations. Bulk Variation Manager generated 200+ variations in a few seconds.