Having enjoyed Stephenie Meyer's Twilight so much, once my eyesight improved I leaped on New Moon, Eclipse, and Breaking Dawn so that I could finish the rest of the series and continue to receive my Edward Cullen fix.
I can report that, sadly, my Edward related experiences in the last three books were a pale imitation of the vampire I fell in love with a couple of weeks ago and that my crush is now officially over. Burgeoning teen romance is so much more interesting than reading about the practical challenges that a Vampire/Human romance causes!
The characters in these books in the series face more peril than in Twilight and this makes for a more serious tone. Thrown into the mix are the global politics of a community that lives for hundreds, if not thousands of years and a local clan of Werewolf types and with this, things were always going to get tricky. Edward and Bella's romantic antics take a back-burner too as they focus on facing these challenges and also in line the author's religious beliefs about "naughties before marriage" and that effectively holds their relationship in stasis for a while. Which is not what you want when you are only reading a book because you have a sad crush on the lead male!
I'd say easy reading but only worth tackling if you have a burning desire to know What Happens Next, or if you are a "finisher/completer" character type like myself, but if not then read Twilight and keep your love for Edward intact.