My stay at Kathmandu Nomad Hotel has been excellent. I am not too sure how long I've stayed in the end, but I believe it has been 2 months in total.
I've been hosted well by the friendly staff and especially Ishwor has been one to check in on me from time to time. Since I stayed for so long, the cleaning of the room was done upon request by me, not always did I have a feeling it was cleaned well afterwards; but truth be told, the hospitality outweighed this a lot more for me. The room was big with a large window and a private bathroom.
At night it can be a little noisy since it is in the heart of Thamel, at a back alley of Narsingh Chok. Narsingh Chok is close to where a lot of bars and such are; however, if you're going to be staying anywhere in Thamel, it will be noisy anyway. For sensitive ears I'd recommend just to bring some ear plugs and you'll be fine.
I can recommend Kathmandu Nomad Hotel for a temporarily stay like mine.