I like it, however I think you should allow more invoices to be sent at the lower level of the plans. Maybe just focus on the per-user limitations, and make th

I like it, however I think you should allow more invoices to be sent at the lower level of the plans. Maybe just focus on the per-user limitations, and make the estimates generation more generous. Also everything should be over SSL - better for you and better for your customers, since if there is a data breach by the user they will still blame you.