This article is not giving all the questions needs to be asked to financial institutions. The most important parameter is the base interest rate (PLR) and discount on it.
Second, biggest warning - never ever take full disbursement from Bank and give it to builder while building is in construction stage. Only Bank and builder will benefit from this term and consumer is badly impacted. Some private sector banks are promoting this package without giving clear picture to consumers. NEVER EVER OPT FOR THIS EVENIF YOU ARE LOSING A GOOD DEAL.