At the moment we've got one physical server acting as our SQL Server (2012 Standard edition), but we want Always On High Availability.

Today we got a sales pitch from Vision Solutions on their Double-Take solution that on fail-over reboots it's backup machine and you're in business again after a few minutes.

Has anybody used Double-Take?
What, in general, do you say about clustering, Always On, High Availablity for SQL Server?
Should we wait for SQL Server 2016?

Thanks