The only thing that I can share with you from experience is, when we perform VMware snapshots our HA Pair loses connectivity long enough to make the other unit want to come up as Active.
So your network guys will probably report back to you that they see IP address conflicts of your virtual servers and some arp response collisions while your snapshots are running.
I have tweaked the failover wait to 3 seconds and it still happens.
I havent seen this disconnect users yet, but if it were me I think I would schedule this at off peak times just to be on the safe side.
Hope this helps.
PS Check out the best practices regarding Virtual LTM's and VMWARE in the deployment guide.
It leaves a lot to be desired but they cant answer every scenario.