We stayed here April 2013 and have only good memories of the place.
The food was excellent, and the owners extremely helpful. They directed us to a tea factory and through their reference were given a very detailed walk around the tea factory (much better experience than a visit to the Ooty Tea museum if intent is to see the actual working of a factory). They also helped arrange for a guide who took us around in the places to visit in Kothagiri. The guy was EXTREMELY interesting to say the least and took us to many places which we definitely would've missed had we tried to go around by ourselves. We'd still recommend that if staying for more than one day, to use the guide only for one day and use the other to see the simple to visit places like the view points, church and museum by yourselves.
Kothagiri was unexpectedly cool during early & later parts of day and the only thing I would recommend to the owners is a electric kettle in the rooms so the visitors can have hot water without having to depend on the limited supply from a flask.
The place is very basic but cheerful and a definite value for money since it is at the heart of the Kothagiri town. Excellent rating because of the lovely hosts who put in their best efforts to make your trip a good experience.