I stayed at the Courtyard - Convention Center while in Las Vegas for CES 2009.
I was primarily looking for a clean, comfortable, and convenient place to stay, and the Courtyard fit the bill. The hotel is across Paradise Rd. from the Convention Center, a short walk to any of the center's entrances, which made it incredibly convenient to the CES exhibits. It is also only about a half mile from the Strip as well.
My room was comfortable and laid out well, with a king-size bed, ample work surface, small couch, and coffee table. A separate "bar" area near near the bathroom provided a place for the ice bucket, glasses, and coffee maker, leaving the entire desk space open for spreading out a laptop, paperwork, and things like charging a cell phone, camera, etc. Like most Courtyards, the hotel is situated around a central courtyard, including an outdoor pool, with each room opening onto a small balcony. (My room happened to look out over the south parking lot, but had a good view of palm trees and some of the hotels on the Strip.)
The hotel staff was friendly and courteous. Free wired and wireless Internet access was available. Free printing from a kiosk in the lobby is also available (which worked great for printing my airline boarding pass). The restaurant is only open for breakfast and offers a buffet and a few cooked-to-order options. The breakfast buffet was a bit pricey, but was a great start to the day.
During CES, the hotel also planned a few extras to make thing easier for attendees, including boxed to-go lunches, a nightly shuttle to/from the Strip, and was helpful in arranging taxis.
I really enjoyed my stay, and will definitely check into staying at the Courtyard next time I attend an event at the Las Vegas Convention Center.