Had 2 nights in the landmark when I arrived in BKK to chill out before doing some travelling about Thailand. Hotel has easy access to the Skytrain system, and close to the main shopping malls.
Have stayed a few times before, hotel does show signs of age in places, but is still worth it even if a bit on the pricey side.
Appears very favourable with business people and especially if any conferences are on.

Just stayed at this hotel last week for 5 nights for business. The staff are friendly and helpful. Some of their English isn't the best, but we managed to get everything we needed for our conference and that was great.

The rooms are a decent size, furnishings and decor perhaps a bit old fashioned but otherwise very nice. No wireless in the room I stayed in, only wired internet connection.

The restaurant has a wide variety of selection for breakfast lunch or dinner buffet style. High quality of food.

The location is also good. Check out some restaurant close by in Soi 8 - Monsoon or Kirralee and in Soi 12 - Condoms and Cabbages.

I stayed at Landmark Hotel, Bangkok in January'12. Have to accept its among the best hotels i've stayed at. The location is the best one you will get in all of Bangkok. The sky train is a 1 minute walk. And the pubs on Sukhumvit Road serve cheap beer and you can mingle with tourists from all over the world. It is located in the heart of the hustle bustle & is almost like an executive 5 star with great service,

We stayed at the Landmark Hotel for three nights (15-17Jan 2012). The Hotel was clean, well located and smart. The staff were friendly and polite and welcoming. The room was well equipped, of a reasonable size with a comfortable bed. We were on the 15th floor at the side overlooking the 9th floor swimming pool. At night the traffic was quite noisy, so book a room on a high floor, although the noise did not keep us awake. The breakfasts in the Atrium dining room were very good, with plenty of choice. The staff were attentive and friendly. We thoroughly enjoyed the breakfasts. We enjoyed the bar adjacent to the pavement during the evening, although the staff clearly allowed prostitutes to chat up the male customers and dissappear into the hotel with them, but what else would you expect in Bangkok. Overall it was a very enjoyable stay.