This is a must for anyone that has ever administered a group in a CRM like HubSpot - this makes it so easy to login and view life as one of your users. Also makes for troubleshooting problems with access controls and permissions. It is hard to beleive that this has been suggested for so long with no action from HubSpot. One thing that HubSpot lacks tremendously is Administrative tools, utilities, and controls like so many other apps out there. SalesForce.com has 2 options: 1) Let an admin login as a user, and 2) let a HubSpot tech login as a user. Both are criticial and should be added to the next release schedule.