Comprise and eCommerce

We are currently using Envisonware for eCommerce payment processing. Based on changing needs on our end, we have identified Comprise as a possible replacement for Envisonware. I am interested in any feedback from Polaris sites that already use Comprise. I would be interested in knowing how the transition to Comprise went if your institution previously used Envisonware or another service. Also would be interested in knowing overall impressions, pros/cons, experiences from the end-users, etc. Thanks.