The best thing I like about this tool is that it offers multiple options for document format customization, which helps in reducing manual efforts of creating different versions or formats (e-books etc) as per customer requirements/customer needs. Also there are some plugins available from third party vendors who can be integrated with schema st 4 so you don't have build your own custom modules using java script / javascript language; but if any such integration exists then definitely go through those before going ahead otherwise they will not work properly along side schemstoolkit version 5+. Schema St5 has improved its UI & functionalities quite well over last year's version i. e., v3.* - especially regarding new features related to multi tenant support where previous releases didn’t offer much flexibility when used across various tenants due to lack of proper documentation provided at time being. It provides an excellent platform.