MissL7777, You may to define your version of "nice" so we don't give you a wrong answer. For example; the rooms are NOT nice compared to the 4 or 5 star hotels on the strip, but as for other 3 star hotels they are just renovated so they are clean with new amenities like beds (mattresses) and TV's and I think you will like them. I only stay at 3 star hotels as that is all my bankroll permits and the downtown grand will not disappoint you (IMHO)
If you define nice as "clean, comfortable bed, good TV package" then the Downtown Grand rooms are nice. They are not luxurious by any definition.
If you spend the extra $10 for a Premium Room you are not really getting anything that I can tell....except for the luxury of being in the same building as the casino and a different color of paint on the walls.
The big suite with the jacuzzi looks nice, but I have yet to see a day when it is available. Maybe that is where the too drunk player, who lost millions at the Downtown Grand stays.