[dhruvkb]

Good: This website is well designed. The feature-set is limited but it's more than enough for most folks. The UI is also pleasant.

Bad: The currency set is restrictive. Two of the currencies I work with are missing. I suppose it would be a small addition to support any currency code (it's just a prefix for the most part) or symbol (like ₹ for INR).

Opinion: Personally I would prefer a CLI tool that would that would take a template and a table to create many invoices in bulk, but this still a good option.