Are you using it for retail or telephone/online?
I think Square is pretty simple, but does have somewhat high fee for telephone/online transaction.
In My Wallet:
Citi Forward (12/2010) | Citi TY Preferred (05/2011) | BofA Travel Rewards (07/2011) | Chase Freedom (11/2011)
GECRB/PayPal (05/2012) | Discover it (07/2012) | US Bank Cash Reward (08/2012) | AMEX BCE (09/2012)
Target (10/2012) | Chase Ink Classic (11/2012) | BofA Balance Rewards (04/2013)
