Currently here, the M Club is fine, offerings aren't exactly my style (bland chicken with mashed potatoes, some sort of sweet-and-sour broccoli, and then vegetables with ranch, yellow/white cheese cubes, and crackers). It reminded me of what the Sheraton North Dallas would put out 20 years ago. Lounge staff is very friendly though. I had a client meet me in the lounge and the staff served us our (paid) alcoholic drinks and it was a much nicer vibe than meeting in the overrun lobby bar. (That said, the lobby bar is decent and is open until at least 11 every night.)

I stayed here last week too. Rates then and this week have been very low ($160ish/night). The Amex Business Card rate waives the destination fee (I'm not sure why, as the "destination fee" message still comes up at booking, but it is not in the rate and the front desk agent said it was excluded on my rate).

The room itself is nothing special but I'm here for the same reasons that I've stayed at the neighboring HP (location and price). I think I prefer this Marriott over the HP but it's actually a closer call than it should be.