You often can get bargain prices for this hotel and there's reasons for it. However, reading the most recent reviews you are not necessarily left with that impression.
For many (most) people, they appreciate and expect a good night's sleep when they stay away from home. They don't expect to rely on stimulants to get them through the day because they have poor sleep or don't sleep much. While some may argue that you shouldn't sleep in Vegas, not everyone is a 20 something pumping and grinding young adult that has a huge credit card limit or line of credit.
If you don't expect to sleep much or your too out of it because you've been partying, then this Trump property is probably for you. I am guessing this is why the Yelp ratings are inflated because it's these kinds of patrons the hotel attracts.
Like others have mentioned, the noise from the train nearby is very disruptive. The hotel doesn't have much amenities. I don't feel it's a five star hotel I think this is a 4 star hotel at best when all the issues are resolved.