Hi Ashwani.
I'm really not the person to respond to this, as I haven't even looked at the OpenACS CMS, but my understanding is that the data model is very good, but the UI for it really sucks. There are quite a few people interested in improving that situation, but for now, the documentation and UI both need a lot of work.
I'm sure some other people here would be happy to answer questions about the CCM. You can also get real-time responses on #openacs on IRC, most likely.
