Cisco SDM

I already read topic about Cisco SDM (security device manager), Cisco SDM is web-based device management tool for cisco IOS software-based routers, benefit are smart wizards and build-in tutorials. Cisco make SDM factory installed on
- cisco 850 series
- cisco 870 series
- cisco 1800 series
- cisco 2800 series
- cisco 3800 series

Cisco also release Cisco SDM express can access from https://10.10.10.1 (factory default IP)

Cisco SDM can launch from a PC (program installed, Windows OS only) and from router flash memory (web)

Cisco SDM does not synchronize with the router configuration automatically must be used refresh button to resynchronize the router running config with cisco SDM.

Is it reliable there is feature SDM ? I think this is like management device from web to easy configuration not using CLI (command line interface) again and using for Best Common Practices. If using this method I can't using copy/paste :d, so must be memorize step-by-step path menu from SDM.