Overall, it was a splendid journey.
Hanoi:  Car, Hotel, Driver and the guide (Mr. Kuyen) were great. 
My wife and daughter think that he is the cutest guide...that we had.
Street Food Tour - Superb.
Tam Coc - very nice and worth it.
Sapa: Victoria hotel - excellent,  very good swimming pool, however, very long walk and uphill to go to!!
The site definitely worth 3 full days even in our very intense schedule!!
The rice paddies and the different tribes are definitely the gem of our journey!
The guide, was very good on the planned treks between the villages and his accent was much better; 
I tipped him generously since after all he was very informative and a nice guy and tried his best during the entire time during our treks.
Halong Bay  Needless to say, a  Gem Site!!!  Aphrodite Junk - Superb by all means.
Hue:  A very interesting place. Definitely worth spending a day there. The Imperial Hotel very good with a great swimming pool (!!)
Hoi-An: What a place! Our favorite one!! (We should skip Saigon and Mekong and should be staing one more day in Boutique Hoi an Hotel (Excellent hotel and Beach, the pool - very big however, the water too warm....better go to the sea....) 
The Guide (and driver) were excellent. Toan is a very informative professional guide (to my opinion, the most professional one!), speak good understandable English. I highly recommend him!
Saigon:
Saigon, a very modern city, and very good hotel (a great swimming pool too).
However, beside the very important War Museum (a great learning !!) and the beautiful Post Office, we should skip this for prolonging Hoi An 
The AO Opera was great and actually "saved" our justification to be in Saigon
The guide was OK
Siem Reap:
What we can say on this extraordinary gem site. 
A very good way to end our trip in this magic place.
The guide and Driver were very good and tried their best for us. However, regarding the accent - see Mr. Kuyen....
We will definitively would go back to all hotels (except the "shower" joint in Lao Cai!) that we have stayed if we come back and this itinerary was immaculate (except for stay one more day in Hoi An and skip the south) .
we definitely will recommend you as a trustful tour organizer in your country.
Thank  you and all the best
Zvi, Malca and Ronnie
From: Zvi Artzi [mailto:]
Sent: Friday, October 9, 2015 23:08 PM
Tour name: Vietnam and Cambodia tailor made 14D