Square payments - cheaper than Paypal

It seems that the cheque replacement cost cutting battle has begun.  Square is offering a cheaper and simpler charging structure than Paypal: a straight 2.75% of the transaction.  Even better (for most businesses), this is designed for 'customer present' transactions and designed to work from a mobile rather than a PC.  Note that if the customer is not present, the charge is 3.5% which is close to Paypal's charge.  See this link for more.