My usage in infina last year was limited due to Magnus and was not able to make the best use of the card.
I still decided to renew the card, because the Card pays for itself in form of Points every year, the annual fees is paid.
If you travel by flights every year for atleast 18000 Rupees, You should take thid card. As only then, you will be able to consume the points you earned due to annual fees.
In such a case, the only component you end up effectively paying is the GST part of 2250 Rs, which is very cool and equates well with the unlimited lounge access for you and add-on Members while you Fly.
All other benefits are icing on the cake.
So this card is a definite in your wallet provided you or your family Travel well.