I am really surprised that i would like a Thai drama to be so good. Well lots have been said by other reviewers so a brief list of why i consider this one a great watch

1. Good insight into thai culture such as marriage ceremony - dialogues, story, direction - location and camera everything was superb according to me - all lose ends and situations were well thought of and tied up - eg; the sunflower following the sun its context in the drama is well explained and such interest to details makes this drama a great watch - the period setting was so on the dot you are literally transported to that world
2. Lovely acting and chemistry between leads - they share alot of screen time together and the romance between them is one of the few longest and sweetest Ive watched of any dramas
3. spiritual messages interspersed on various situations in life is given as advice by the mothers to their children - i liked it a lot
also messages such as the need for a country and its citizens to not indulge in corruption and its effect etc make the drama worthy of watching
4. Great camera work the opening scenes and food layout on their breakfast/ lunch tables look so beautiful. Music is also really enjoyable (though i dint understand a word - sounds very pleasant to the ear)
5. Realistic story about how marital life and how a couple grow into partners and family
6. Even in the adopting family everyone is shown with a good heart and have good understanding - even mother/ sisters are not shown as the evil step mother/ stepsisters type- which was refreshingly different for me.
7. Some people may be put off by the black magic and spells used by bandits but this shows the reality and culture where gullible villages in asia still strongly believe and practice such things
But the best message is when one practices goodness and has blessings and prayers of a lot of people it protects and helps overcome- i can relate to such beliefs

I thought of rating it 9 or so but the ex girlfriend was quite annoying but I felt the story needed a villain as almost everyone is portrayed as upright and ethical - so excused it as any drama would need something to test the couple so its understandable. But her repeated shameless attacks are a bit too much and doesnt match too well with the overall sensibilities and sophistication displayed by other characters.
Also the lead guys inferiority complex and his indulgence towards his ex and repeatedly allowing her take advantage of him is a little bit of a downer.

On the whole the lead couple and their chemistry onscreen is so sweet that hardly forwarded any parts as i was afraid of missing a nice dialogue or scene- on the whole dont miss it