I loved PS I Love You, and was expecting this to be good - I wasn't disappointed! The style of writing - in emails, instant message, and greeting cards - is very easy to read and really makes this book stand out, mainly because it provides a completely different perspective from the usual.
This book seemed to be to be more mature than the first one - it was more like the epic sagas of Maeve Binchy or Rosie Thomas - probably because it covers such a long period of time. At one point (I don't want to give anything away!), I must admit, I did think 'oh no! not another twist!' but as I carried on reading I lost that feeling because the situation was so plausible and realistic. Generally, it kept me hooked and I read it in one afternoon and evening.
Finally, the thing I especially appreciate (call me old fashioned!) is how clean Cecilia Ahern's writing is - a little swearing, but no sex - so I'm completely happy to lend/recommend to my little sister or aunt.
Overall, a great book for a summer holiday or a cold, rainy day, or an evening on your own - fantastic escapism basically - and that's what I love!! :)