Perfume and inconsistencies
We booked a suite for a night at the airport before returning home from a couple of weeks in Colorado. We were a big family group - five of us. All went well at check-in, once we found the entrance to the building - not well marked. Getting to the elevators was a bit challenging, quite a maze to get around.
Our room, was a two queen bed suite with a separate sitting room with a pull out bed, as requested. First, the smell - so much perfumed cleaners it gave many of us a headache - I do not understand why hotels pour so much of these toxic products into their rooms, clean does not need to be perfumed. 
Next, the pull out bed was not made up, so we had to do that ourselves - then decided not to sleep on it, because it was very poor quality and all springs. So one of us just slept on the sofa. He also noted that the fridge sounded like a car engine starting all night and there was no weather stripping on the door, so he heard everything in the hallway, don't think he got much sleep.
TV - the remote didn't actually work the television - we had to call to get that working, there are multiple, unmarked remotes.
Wireless - it seems there is a limit to how many devices can sign-in from a single room. Apparently a room (booked for 5, capacity of 6) can only have 2 devices accessing the internet at a time, anything more is considered spammers???? So, another phone call to off site tech support with limited results, one of our computers (newest) was never able to access the wifi, and I wasn't willing to sit on the phone for another 20 minutes to figure it out.
Showers, three towels - yea, count them - we booked the room for five people, the room had three towels in it.
We didn't stay for breakfast in the morning, met friends elsewhere.
As we were leaving, a staff member was out sweeping near our truck, in fact right next to us. He completely ignored the just emptied luggage cart and kept on sweeping. A bit of service at the end of our stay could have made me feel quite a bit better about the place, but no, I had to take the luggage cart back.
There is nothing overtly wrong with this hotel, it is new, smelly clean and convenient to the airport. We have happily stayed in many Hilton brand hotels, yet the Homewood Suites in Denver was quite a disappointment.