Flexible by offering a consumption-based plan and a few monthly flat rate plans. Based online so there is nothing to install or fees to use the upgraded versions of the software.
Haven't encountered any!
Greenerbilling has made it simple for me to send estimates and invoices to my customers. Being a newer business owner, I didn't want anything overloaded with accounting elements that I did not need. This application keeps it simple and to the point - billing and payments. The alert system makes sure I do not forget to follow up on past due invoices or expired estimates. I recommend this to anyone who owns a small business and needs to do estimating or invoicing via online software rather than one that you must download and install.