we have some photos here
Loads of us have stayed at the landmark and loved it. Put Landmark into search( and also Thailand forum) and you will find lots of information. We don't have a dedicated thread to it though.
The Landmark is brilliant and is in a great position both for the sky train and lots of great places to eat

I second what Fiona has said. Recently stayed 3 nights end of March in their club rooms, paid them in $ cash which I had pre ordered from Crown Currency and got a good rate of 1.9 to the £, so paid about £75 a night.

This was our second stay here and we love this hotel. Thought we would try somewhere different on our last night in Thailand and I booked the Millenium Sukhumvit, although very nice we wished we had booked the Landmark for location. We will definitely be returning customers to the Landmark.