The Marriott Hotel in Prague is right near the middle of Old Town, just a short walk away to the astronomical clock and other tourist attractions.
I stayed on the 3rd floor in a fairly modern room.
The desk was a nice touch but the chair wasn't particularly comfortable. The couch wasn't that great either, so most of my laptop usage was on the bed rather than at the desk.
I particularly liked how they had USB and a US outlet, they were very convenient.
No coffee machine, but the room did feature a kettle.
The shower/bath had a lot of pressure and was easy to use.
The breakfast that came with the room was served at Midtown Grill downstairs. The buffet had a pretty decent spread and I'd say it's slightly above average in terms of quality to other hotels I've stayed at.