Indeed, $41 is all-in with taxes and there are multiple room types available with breakfast even thrown in.
This is a well-regarded property, though I haven’t stayed there. It’s among the better ranked for the area on TripAdvisor, and part of Marriott’s “Autograph Collected”-branded properties.
I would wait several days after booking before making non-refundable travel arrangements around this rate to ensure that Marriott plans to honor the bookings.
Most of the deals I find at Extreme Hotel Deals aren’t especially useful to me, single night offerings where it’s unlikely I’ll be in a city when they’re available. Nonetheless I find their email list interesting at a minimum.