I have visited and stayed at the Hotel International a couple of times. The hotel is conveniently located along the Muyenga road. Further away from town (which is a good thing if you are looking for some sanity; some peace and quiet). It is easy to catch public transport to town from the hotel. No crowds, no hassles. The gardens are a great place to unwind, the food is very good, and the staff are really nice people.
The rooms would definitely be nicer if the old carpets were replaced.
While there is a business centre, it is more convenient to pick yourself an internet modem to be able to work anywhere in the gardens without much network interruption.