Salesforce.com integration needs work: When we were sending our mass mailings, the systems sometimes created new leads instead of logging an email send against an existing lead. This took a little work to fix. Also, when we do send out a Clearslide pitch, the lead just shows that a pitch has been sent, but it doesn't give any details about which version, etc.
Email reputation needs work: A much lower volume of email sent through Clearslide is getting delivered than we would like. We have used Marketo which definitely had higher click-through and open rates. We have talked to ClearSlide about helping us to use their product as a quasi- marketing automation tool for scheduling emails and running campaigns, and they have told us that some of this is on the roadmap.