What's so good about it is that it so wholesome and clean and pure. An instinctive "feel good" book though not necessary completely happy. But it covers everything, relations, aspirations and emotions.
Francis Bacon rightly said,
“Some books are to be tasted; others swallowed; and some to be chewed and digested.”
This is one to be chewed and digested and cherished in the heart. It's very vital what we read 'coz we imbibe certain characteristics based on that. So it makes sense to read some books which would mould us better. Of course if we strive deep enough we will find good or bad in any book but it's more likely to get good in this book. But I feel even Enid Blyton is splendid for any age 'coz long forgotten lessons of purity and goodness do come back to you in it sometimes ...Isay that from experience! Even without that, it's always good to read your childhood favs once in a while - gives a kind of security and childlike carefreeness.
"Brida" is another masterpiece-the author holds you gently and takes you out of this world while showing you parts of this world which you missed out while in it. It's a miracle how such a book is written!
Of course there are too many good books for me to write about...books almost always seem to keep me good company!