I was able to test reply.io and actually purchased 4 LTD codes because this is a great deal.

I'm giving this 5 tacos, but here are my findings so far...

01. Perfect if you're a solopreneur.
02. Reply.io has salesforce integration along with others. (awesome!)
03. Sequences are easy to create, use and execute.
04. Great Templates! Less time spent on messaging.
05. Responsiveness. Immediate welcome.
06. Clean unbloated interface.
07. Built in LinkedIn Email Search.
08. Needs a Dashboard - a login place where you can prioritize your day, feeds, etc.
09. If you're a small team, you're sandboxed, no team workgroup, but if you want access to team you can easily upgrade "Team members can be invited on regular (non-AppSumo) Reply plans. Please upgrade your account to invite them."
10. Plugin for Salesforce is not authorized for distribution as part of Salesforce’s AppExchange Partner Program. Version is at 1.5 September 2017.

I hope this helps if you're on the fence - especially worth the investment if you're a solopreneur.