Hi Avnish,

Disadvantages of salesforce are:

• Overly simple user interface that is quickly outgrown by experienced users.
• Lots of screen refreshes and scrolling up and down; the transition between multiple screens to process transactions can deliver a tedious experience.
• Marketing management functionality is extremely limited. SFDC points to partner applications for this purpose. This involves additional costs and vendor management.
• Customization toolkits can be cumbersome to use, even to many seasoned administrators.
• Dashboards may not reflect the application security for specific users without significant administration effort.
• No Service Level Agreement provided in standard contract.
• Data center reliability has been questioned and several major interruptions in service have been widely publicized.