We stayed at this hotel during 06 civic weekend and overall Marriott Ottawa stands offers a lot for it's price range. We received a decent deal for the weekend that included dinner voucher for hotel's restaurant.
There is a fee to park inside hotel's underground parking lot. It's around $17 depending on weekend or weekday. The best part about staying at Kent St. is that you're in Ottawa's downtown main core. Literally you can walk to the Parliament, Rideau Canal (world's longest skating rink), Bank St., Wellington st and near the world's famous Byard Market.
Hotel's staff were also very courteous and very polite both when checking in and out.