First of all, the room was clean and the view was definitely amazing! Both the shower and the tub are big enough for 2 people and the bed was very comfortable. But, don't let the word "penthouse" fool you. This room is about as big as regular hotel suite with a kitchenette. But again, it was more than substantial for our needs. The pool was a no-frills patch of water in a concrete jungle and there is very little shade unless you rent a cabana.
We did see one roach in the room but we were able to shoo it outside to the balcony and never had another issue with bugs. My only suggestion is the room needs at least one more trash can available and preferably a larger one. Over the three day weekend, we filled the smaller ones beyond capacity. There are also no tissues (Kleenex) for the guests other than toilet paper.
The only real problem we had was with the Valet service. Since this is the only way to park at the Signature, we considered it part of the value of the price we paid. However, we were only able to park there Friday afternoon. They closed the Valet service around midnight every night thereafter because they were "full". The front desk told us they only have 500 parking spots for 1700 rooms. So, we had to fight more traffic to get to the other side of the hotel, park at the MGM, and then walk back to the Signature every single night. This was both frustrating and disappointing since we had been walking all day. The front desk did compensate our parking each time, but again, it just one more thing we had to take care of before leaving the room and begin our walk back to the car.
Other than the parking issue, the place was great and I would recommend it to those guests who plan to walk, Uber/Lyft, or take a cab around town.