This hotel works surprisingly well for a business trip, and will all its history has bags of character. The staff are obviously proud to work for one of the oldest hotels in the world, and convey that in their engagement with their visitors.
My room was intelligently laid out, given the constraints of the building. I visited during a heatwave, and the room had a portable air-conditioning unit, which was effective.
There is a really good organic Thai restaurant in the same building. But it is popular, so you will need to book in high season.
One thing to watch out for is that the free broadband has quite low bandwidth, so for serious work you will probably need to use your phone's data connection.
This hotel is in the center of a city, so don't expect it to be quiet. I didn't find the noise from bars and restaurants intrusive, even when I had the windows open for the heat. Definitely don't aim for a lie in though. The hotel is close to St Sebald's, and no one can sleep through the bells at 07:00!