PowerPivot - Personal BI on your desktop

What do you think about business intelligence (BI), a lot of people believe BI is only for big enterprise because it is expensive, takes long time to implement and requires special trained consultants to set it up. The worst part is that it does not often deliver what it promises to do - real time, self-service information delivery. Even they have BI within their organization, many analysts still heavily rely on their most trusted software, Excel to do their analysis because their corporate BI just does not provide everything they want or they are not familiar with the new BI environments.