We had lunch at Condor Café when most of the restaurants in the city weren't serving lunch anymore - that's a good point about the place. We asked the menu for Bs 30 (drink not included). It was nice, nothing spectacular, but the soup was delicious. The place's atmosphere is nice, very bright and airy, and its location is very convenient within Sucre. The staff was also friendly and the food didn't take much time to come. The WiFi didn't work in my phone, though.
A very positive aspect of the place is its non profit status.
Cons: WiFi didn't work