Anybody using any appointment setting agencies ( or individuals) they have been happy with? We are in SME / Large Enterprise space selling to sales/marketing ops , VP Sales / Marketing function

Outreach.io
Groove.co is used by many of the fastest growing sales teams in the valley (Slack, Google, Asana, etc.).  We replace people that are using Outreach all the time.  We do have an Alchemist discount but we are only a good fit if you use SFDC.