I suppose CDMA network has a very good coverage here, have even heard many people saying this.
Sorry to go off topic but just wanted to reply to that:
Technically CDMA cell site covers a wider area than a GSM cell site. However, with the advent of WCDMA (3G) & HSPA+ networks, it won't be long before 3G cell sites have better coverage than CDMA.
Also, 3G, HSPA+, LTE networks are far more effecient in handling enormous voice & data traffic (due to greater capacity) that they have more customers worldwide than CDMA customers, which makes them more preferred even when roaming internationally.