<human>: I posted my original Vietnam itinerary [here] and got some great feedback on it from another redditor. Now I've updated my itinerary to the below and want to get some final advice on it before I mentally lock it in! :)

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8/27: 8:30 AM land in Hanoi, chill at Hanoi Backpackers (Downtown) hostel/explore Hanoi and then take overnight train to Sapa

8/28: Day in Sapa and then stay in a homestay in Sapa - Tavan Chopai Homestay

8/29: Full day in Sapa and then take overnight train back to Hanoi

8/30: Check into Hanoi Backpackers spend the day/night in Hanoi

8/31: Leave for Ha Long Bay overnight tour and stay 1 night there

9/1: Ha Long Bay / back to Hanoi 1 night - overnight bus to Phong Na

9/2: Stay in Phong Na - Easy Tiger Hostel

9/3: Stay in Phong Na - Easy Tiger Hostel

9/4: 4:30 AM start - Get bus from Phong Na to Hue and stay 1 day and 1 night - Hue Backpackers' Hostel

9/5: 8 AM start - Easy Rider motorcycle through Hai Van pass to Hoi An, stay in Hoi An - Hoi an Backpackers Hostel (DK's House)

9/7: Stay another night in Hoi An - Hoi an Backpackers Hostel (DK's House)

9/8: Train or Bus to Da Nang Airport and fly to HCMC, stay in HCMC

9/9: Stay in HCMC

9/10: Day in HCMC and then fly HCMC -> SFO

Can you give me the gist of the text in a nutshell?
<bot>: Sapa, Hanoi, Ha Long Bay, Phong Na, Hue, bike through Hai Van pass to Hoi An, and then fly to HCMC and finish my trip thre.