we have been using Constant Contact from last many years, product is great, pricing slightly high and support service is PATHETIC & AWFUL. we recently stopped using CC and started using other company and we were surprise to see the promptness on every email query we sent them...its lightning fast. Constant Contact do not reply on emails for months, no body seems to be concern or bother about old clients. CC expect us to call from India every time at midnight (23 Hrs time difference) paying every time for international call(which is hefty), putting us on hold for almost 20 minutes..WOW no body ever thought about international clients. Any email to support or billing goes unnoticed for months and months...just for you to check, search for emails we sent from registered email and you will believe.
Good Product like yours will grow more if company focuses on email support services and on old clients at least for International clients to start with.