Lost is without a doubt an excellent show and I enjoy the ride evry time.
What is really entertaining is each week my girlfriend complains when I start watching, "I don't understand what is going on here!" and then exits the room.
That is the whole idea, no one knows what is going on, where they are, why and what might be next.... just sit back, speculate and wonder and get on board.
It reminds me and captivates my imagination similar to the X-Files during the first few seasons where they blurred the line between reality and fiction/myth.