The KGH is in a really good location, right in the middle of Thamel (as long as being in the tourist town is what you want). The hotel is really easy to find, both on foot and by taxi. I had a standard room in the older part of the hotel. It was ensuite, had twin beds and a small colour TV which showed US cable shows. The bathroom and bedroom were really tired, but were clean and simple, so I had no complaints. As a solo female traveller I felt safe in the hotel, and my room felt secure.
You have to pay for wifi and as I was staying in Kathmandu for two weeks I got a 24 hour access voucher, where you log in and log out each time you want to use it, so I used it for a couple of hours per evening, for work. I found the signal to be really good, and reliable. However, there are also cafes nearby which have free wifi, so you might want to check that out first. I found the garden was a really nice quiet place to sit and read. They have a covered area with a small library of books, and you can get bar service outside as well.
I only ate breakfast at the hotel, as there are so many other places to eat lunch and dinner nearby.
Some of the more upmarket hotels have generators, so the rolling power cuts don't impact their customers, but if you accept this as a fact of life that most people in Kathmandu go through and have a book, laptop, or just go out for a drink when the power cuts happen, then it isn't too bad. Also, the front desk can tell you when the power cuts are planned, as they get a schedule, but sometimes the schedule is wrong, and the load shedding happens at different times or on the upside is mercifully much shorter than advertised.