I used Dwolla because I have GoDaddy Bookkeeping and it appeared to be a simple way to accept checks from clients. I've only had 3 client use it in the last 4-5 years. The 3rd one accepted and processed the payment. I withdrew it to my bank. Well, it never showed up in my bank. I found 2 emails and sent emails to both of them without a reply. I also found 2 phone numbers where you can leave messages that no one ever replies to.
Beware this is not a legit company!