Again, we didn't stay at Casa Canada - we spend 5 nights across the street at Sunrise Hotel. Casa Canada looked nice so we thought about treating ourselves for two nights even though it was out of our price range. The first time I went there the office was closed and when I asked someone in the restaurant when someone would be there to inquire about staying for a night they just said "I don't know" and walked away. That night we went there for dinner - when we arrived at about 6pm there were several employees sitting on the stairs that lead into the restaurant. just as we started to walk inside someone turned off the lights almost causing my wife to trip - seeing that we clearly were not welcome we turned around and left.
Big Corn didn't seem to have much to do overall. The side of the island where Casa Canada is located is quite windy and the waves are too rough for swimming - there is a nice swimming beach on the other side at Picnic Center however the beach-side restaurant there plays really LOUD music (they play the same CD over and over).
I like Little Corn because it's more rustic - no roads, no cars - just lots of unspoiled tropical beaches, friendly people, and delicious food.. We stayed at Carlitos for $30/night had a small cabin just 10' feet from the water. Only has electricity at night and cold water showers. Just up the beach is Little Corn Beach Bungalow which is probably has the nicest accommodation on the island with hot water showers but it's more pricey.
Let me know if you have more questions