We've got several customers switched to Meraki from conventional Cisco.
One thing to keep in mind is iscsi storage traffic over meraki switches.
I would strongly advise not to use meraki for them but use catalyst or even nexus.
Besides buffering and latancies the problem is with updating the networks, you jst must sometime.
This wil result in a maintenance window (yes even though your network design is good, you dont want to take any risks)
Luckily this became a bit better with the staged updates.
In a conventional setup, those switches don't even have internet connection and are managed oob.
Just can't do that with meraki.