Cold water and lack of proper parking spots
I stayed in the room and was never sure what temperature the water would be. Sometimes it would be hot and get hotter. Sometimes it would go from hot to cold, all in the same shower. That problem is enough to make me not want to return. 
Also, the parking spaces were in short supply and were physically short. Because the spots were so small, cars and trucks were over lines both sideways and lengthwise. Denver has SUV's and this lot made no provision for them. I did not have a big SUV but I could only park in the back with my passenger getting out to help though I even had a rear view camera.