Very clean hotel, beautiful design and artwork, the service is beyond amazing and all the staff are so thoughtful! I've stayed at a lot of high end hotels (like recently the Waldorf Astoria in Beverly Hills) and the staff at L'hotel du Lac provide a far greater service! They remember your name and any detail you've told them, open the doors when you approach the entrance at any time if the day, remembered when our departure date is and where we were traveling to next and offered to set up and tours or rides, when we missed breakfast (that's included in our stay) when we slept in, they offered to send up tea, fruits and breads to ensure we've eaten breakfast, and they even provided a really nice departing gift! And the breakfast was astounding!! We got the Vietnamese traditional breakfast items like pho, fried sticky rice and traditional coffees and they were better than most of the popular restaurants we've tried around Ha Noi!
I booked this hotel as a last minute hotel change since I wanted to be in the Old Quarter and couldn't be happier with the choice, it's perfectly located, walking distance to the main attractions like train street, the lake, popular shopping streets, the cathedral, and popular restaurants. If I visit Hanoi in the future, I will be coming right back to this hotel.