I didn't really like it. It was amusing indeed but after I finished then I wondered: so what? It has no content and even though the edition I bought mentioned that on the preface (V. Nabokov being criticised for the lack of content on it he replied to the critics that his intention was only to narrate a story) my expectations for it were high. I suppose I could have enjoyed it more if I hadn't expected anything from it.
BTW, have you watched the films? I have only watched the one directed by Stanley Kubrick and I'd say it is a good adaptation of the book.