This topic has many views and is a few months old now. I see other questions asking about importing too. The “New Customer” form only has a few fields, it would not seem that difficult to add a CSV import for customers.
This is the primary thing holding us back from using Manager at this point. Creating invoice items will not take long. Setting up an invoice template only takes a few minutes. Typing in 100 customers’ names, addresses, etc will take hours. Please please move this up on your to-do list.