VPLEX local and ESX 3.5

Hello

I begin a Project with VPLEX and VNX.

Today, I am ESX3.5 on CX4-480

I think that ESX 3.5 is not supported with Vplex.

But not supported, does not mean does not work !

What are you Return of Experience ? Migrate ESX3.5 to ESX 4 ? what are the risks for VM on ESX 3.5 ?

Thanks