There are two. The Courtyard at the Marriott Village and the Courtyard Vista Centre. Have stayed at both. Both are nice, very clean hotels that are close to Disney. The rooms themselves are much nice than the All-Star resorts. The theming obviously isnt as good, but thats expected. Also, the transportation isnt as good to the parks, because you get to use WDW Transportation at the All-Star resorts.
When we stay off-site, we try and stay at one of these Courtyards and recommend them to people regularly.
Would definitely recommend the Courtyard at the Village. Only issue is getting out of the parking lot some days -- traffic gets backed up past the driveway. Hotel and pool were very nice.