I love the idea of using Zoho Invoice to collect feedback from my cusstomers. My business is a business in which we process one transaction with the customer, and we don't have any more business with this customer for several years down the road. Requesting my customers to create a user name/password for client portal doesn't make sense.

I would like to see the client review functionality to work without enabling the client portal for my customer. This would allow business es like mine with one time customers to request feedback from the customer.