Let's keep this simple: great location (bridges to Bellagio, Aria/CityCenter), clean, affordable (look for online deals), and still upscale.
It won't blow you away with a fountain or a garden or the hottest club in Vegas, but this is your place to sleep dammit. If you so choose to do so while visiting Vegas. I did, it's good for you. While you're sleeping you aren't spending money. Well, other than for the bed. But it's a nice bed.