I had a great time in Vietnam with Jack, Hiew and our amazing group. Trekking through the jungle was unlike anything I'd ever experienced before. It was super rewarding, with amazing views, and I felt well supported throughout by our guides and group. Be ready to support each other as a team on some of the tougher days, and I'd suggest bringing poles if you have them as there's a lot of incline and paths can be slippery depending on the time of year.
We had a few vegetarians in the group, myself included, and Jack went out of his way to ensure we were all well fed, and got to try all the foods we wanted to on our last night in Hanoi. The advice about snacks is worth following, and if you have specific requirements definitely bring them with you from home, if not the local snacks were all delicious and worth trying.
I was impressed by the accommodation, particularly the hotels which were on the whole nicer than expected. Due to a medical incident I only ended up staying one night in a homestay, but it was a great way to get a taste of rural life and our hosts were friendly, welcoming, and made great pancakes.
Finally, our guides were exceptional - knowledgeable, patient, and responsive, they also kept our spirits up on the trail and the longer travel days. A particular thanks to Jack, who responded instantly and effectively to any issues, and would always find a great solution.
This was my first trip with MBA, and I'd recommend it to others - the description gives a good sense of what to expect, but know that the itinerary can change as needed, so bring a flexible mindset and everything on the kit list.