One of my friends graduated from Pondicherry University. Here are some things you need to know about it before making a decision.
My friend got a good rank (read AIR-1) in 2014 but he ended up pursuing it in NIT Durgapur. So think wisely.
In general Pondicherry University is a good university. But not fit to meet the requirements of the industry. Better join some other university. In the long run, PU is not a good option. Placements are not up to the mark.