We stayed at the IP for 5 nights, and definitely enjoyed the location - right in the middle of the strip. That is the only thing we enjoyed....
The staff was not all that helpful or friendly with check-in or anything else. They just didn't seem to care.
The layout for the rooms was AWFUL We stayed on one of the higher floors (maybe 7th?) and to get there was a chore. The elevators were so slow, that there was always a huge group of people waiting. So, when the elevators FINALLY got to us, there was almost a fight to get on. We had to wait, on average, 10 minutes every time we used the elevator. After you get your elevator ride to your floor, finding your room is the next challenge. The hallways are a big maze and very confusing.
The rooms are gross. Carpet is stained and dirty, paint is chipping off the walls, the bed is extremely uncomfortable, and it in general just looks really seedy. The bathroom was clean enough, but to take a shower was really to take a bath/shower as the water took forever to drain.
We went to the buffet for breakfast, and almost immediately decided to never go back - for any meal. The food tasted gross, even the water had a funny taste! The food was the worst I had in my entire 6 day stay, of all the places we tried on the strip.
The only other good thing I can say about this hotel (besides the location) is that the food we ordered to our room late one night was very good. The portions were extremely generous as well.