It is really easy to create and send an invoice. You can store addresses for future use, add notes, etc. The invoice itself is clean, easy to read, and easy for the customer to pay. You receive an email when the invoice is sent, and another when the invoice has been paid. Money from your square account can be deposited into a bank account (automatically) the next-day for free. (Instant deposits are available for 1% of deposited amount.) Review collected by and hosted on G2.com.
Processing fees - but they are unavoidable. For invoices the fee is 2.9% + $0.30 compared to keyed-in cards which is 3.5% + $0.15. Review collected by and hosted on G2.com.
It's so easy to get an invoice sent out (and paid!) quickly with Square Invoices. Review collected by and hosted on G2.com.
I haven't had a single issue using Square Invoices to date (2+years of use.) Review collected by and hosted on G2.com.