I just got a room offer from Downtown Grand in mail: three free nights, $25 free play valid until 12/29/2014. I stayed there for two comp nights in June. I don't think I played enough during my stay. I had about $400 coin in on slots and about 1-2 hour pai gow poker at $15 bet.
I had two different room offers at dtg but they wouldn't accept them for dec 29 and 30th. I ended up using my GN comp instead. Dtg loses out on my money.
I gambled there for an hour to two before they actually opened (halloween 2013 when they did a soft launch). They seem to send pretty decent offers. Most recent one is for the next few weeks. 3 comped nights, $50 in food and 2 tickets for 1 day of the Rodeo.