Staying in Las Vegas is always hit or miss. I recently stayed at the Rio and had a pretty decent experience. The hotel is getting a bit tired, but is still functional and comfortable.
I attended a meeting in the conference facility and had a couple of decent meals in the restaurants on the property. The lobby is noisy and smoky with all of the gaming tables, but that’s Vegas. My room was big and very quiet.
The only other downside is that this hotel is not on the strip but rather 1/2 mile away. It’s not a bad stay, but probably not a repeat.