I would definitely recommend this tour, greatly enhanced by our excellent tour guide, Hung, who was incredibly helpful, patient and enthusiastic as well as very informative. Our various local guides were also all very good. There was a good mixture of rural and city walks (without too much time spent in a bus) which included seeing local crafts and industry plus sights of historical interest.
The highlights for me were the two day long hikes, one in Py Long Nature Reserve and the other in the hills leading to the Cham temples. Also, staying at the retreat in Py Long, plus the homestay in the Mekong delta were a real chance to see local life. Other walks involving walking from village to village, were also very interesting.
My only criticisms would be that, as this was advertised as a walking holiday, it would have been good to have has more countryside hikes, and had less time in cities, particularly Hanoi and Hoi An, both of which were very busy and touristy.