[c-nsp] PVST+ with arista box

[james list]

Dear experts,
I'm looking for hands on experience in interconnecting a huge cisco network
 (>400 vlan) running PVST+ with some arista boxes which in principle as
default uses MST but in theory could interact with Cisco proprietary PVST+.

Despite the arista document which confirm the interop, has anybody ever
done something similar?
If yes any outcome?

Thanks in advance

Cheers
James