Need advice on health insurance port!

My dad has an existing family floater plan of Star health family health optima plan which is an OK product but has room rent limit...co pay etc. The premium is about 51k after taxing. The cover started at 10L and has 1.5 recharge so every year so now cover limit is 16.5L. I want to know few things : 1. The agent is suggesting the Star health assure policy which apparently does not have room rent limit and co pay. What I've heard bad experiences from star health so should i opt it ? 2. Which other policy should i consider ? 3. Will i be able to get the same 16.5 cover after i port to some other policy.

It would be helpful if you could guide me as this is a big decision and I don't want to just go by what agent likes to offer.