I would stay away from Double-Take and Neverfail. Didn't have good experience with either of them.

I like AlwaysOn Availability Groups but you'll need Enterprise edition to take full advantage of it.

>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