This seems to be a reference to Mexpat's excellent writing about leaving CR.
http://www.costaricaticas.com/article.php?id=43
Mexpat made the point that the CR experience is different if you are living there vs. going down every so often for an intense visit. This would be true for say, Las Vegas too.
Also, your experience in CR is affected by your age, just as you yourself are different at these various ages.
Mexpat's description of CR itself was a little bit of a downer, but really there is no reason to agree or disagree, unless you too are planning on moving there, in which case you need to know. Of course, it may be quite different for you, as it is for Bilko, VB and others that live there very contentedly.
Mexpat's contributions to this board were great, I hope he is doing well.