We've tried a few different email to customer extensions. This one had everything we needed. From the ability to email an individual customer on their order page or choose to send email to multiple customers from Manage Customers. We also like that we can see an email log for each customer showing all message details. There is also a log that shows emails sent from every customer. Creating email templates is such a time saver and a huge benefit to the CRM side of our business. The developer is easy to communicate with and open to suggestions for improvements regarding extension. Relatively speaking this developer is quick to respond given our vast differences in time zones