If you mean the ES at Denver airport, think 3 words: MIDDLE OF NOWHERE.
If you have ever been to Denver airport, you know that it is in the middle of miles of absolutely nothing. If you drive a couple of miles from the airport, there is a small group of buildings sitting all alone, like a mirage in the desert. That's where it is, along with a half dozen other hotels. It is fine for layovers or next day departures where you have nothing better to do. The hotel is nice, pretty standard for an ES. There is one restaurant I believe nearby, and when I was there in fall there was construction in the area. But understand that if you don't have transportation there is NOTHING to do. NOTHING. Someday I'm sure it will be all built out, but for now if you want something to do, look do other locations in Denver.