I stayed in Mayura Valley view in Dec 06. All rooms are facing Valley, so all had great view of green hills. On valley facing side all rooms has big Glass wall, which is best part of the room. Dont open windows at night otherwise you will have to sleep with all kind of flying insects :)
Hotel was actually renovatted part old hotel and so it was very good. On both side of this you will find Bhutiya old building with grass grown on all sides of hotel including walls and terrace. Actually this old part will be great for shooting of some horror movie :)
Rooms were as such clean, but mattress werent clean so explicit request to change it is required.
We paid around 900 for a night in standard room. Staff is friendly as such. But restaurant staff were a bunch of dumb fellows. Food is the worst and they will try to earn as much as they can by selling you worst food. Dont listen them and dont even think of eating there. Ill suggest there is one hotel near petrolpump in main town. I forgot name, but its very famous. You can ask anyone where good food is available, most of them will direct you to this hotel. Its on right side immediately when you enter coorg city.
Make sure to make reservation in advance from their booking counters in Bangalore. Especially on weekends and in busy season.