If so how are you finding it and how do you have your multi-site setup configured?
We're looking more and more likely to go the P4000 route and I'm looking at how things like failover work between the P4000 and vSphere (I have read the HP PDF's).
Our group has four P4000s across two sites. We use them to host HA VMs on Hyper-V. VM Guest performance has been very good. Using multipath IO on 1 Gb ethernet SAN fabric, with jumbo frames and flow control, per HP guidance. I'm guessing performance would be similar for vSphere HA. Failovers with live migration is a non-event.
To perform a multi-site setup, you need to have nodes at either end. We use async replication, because our link is not fast enough for synchro rep (needs to be 1 Gb or greater). Still suits us for DR purposes. Eventually, we'd like to implement synchro. The management console is a breeze to use.
We bought our initial applicances back when it was still LeftHand Networks. We've compared Dell EqualLogic and felt this served our needs better.
I would highly recommend you read this guys post.
We also has similar problems with HP support, and some problems with the P4500s crashing for no apperent reason. I guess thats why you need two of them all the time.
I inherited this LH stuff when i joined the company. We stopped using it about 6 months ago. You have to understand the reason that no other vendors use commodity x86 servers to build SANs with.
Its a fundamental architectural weakness. based on my years of experience SANs