Was Lost Worth It?

Six seasons of a mysterious island, airwrecked survivors, mysterious happenings.

Was Lost worth it?

I am asking since I stopped watching in season 3 as it was delving into a far too deep and ridiculous rabbit hole, although I have to congratulate a TV show that does not get canceled and where the finale is controlled by the creators.

The last episode aired last weekend.

Is it worth it to go back and catch lost episodes (no pun intended)?

BTW, here's JJ Abrams on TED discussing mystery boxes.