I skimmed through most of these reviews, and I found a lot of assumptions about this play. On the other hand, I found a lot of vague speculation, which seems the most modest and reliable perspective in approaching this play. To read Beckett is to not find that definite line-- especially in the word "Godot"--which will define the entire play. In the "Preface to Shakespeare," Johnson said, "when he offered his house to sale, [he] carried a brick in his pocket as a specimen"; in other words, it is wrong to find too much meaning in selected passages of a single work, but instead grasp the entire philosophy of the book. One must grasp, first, a general meaning of the play retrieved from various stimuli.Such stimuli can be found in the following: "The Myth of Sisyphus" by Albert Camus, possibly followed by his novel, "The Stranger". When the concept of "absurdity" is understood, then proceed in reading "Waiting for Godot". This will be an easy climb to a higher understanding, and a potentially unique and intellectual opinion of this tragicomedy play on existentialism, or the absurdity of life.
Further stimuli: Jean Sartre, Heidegger, Kafka, and (to jog your creativity) Borges.
I am aware that I haven't given any personal opinions or guidance of this play, but I feel that I would be doing a great disservice to you if I had. This book is an excellent book; however, it is not a book for the wreckless reader, but instead it is for the sagacious ones who will suffer a little research to truly understand the philosophy, which can not be done in a 1,000 words, or explained as well as those great minds who unveiled these philosophical jewels--hearsay will, in other words, diminish the mind-expanding effect.