Summary: To the reviewer below calling someone "retarted" (do you see the irony here) I have bought 4 of these units and I've had to send one back because of this fan issue. If you haven't had one do this then you have no idea of just how crazy loud these things can get.
Pros: This is a great server if you can get it on sale, not much comes close to it for the price.
Cons: Some have issues. HP is not quick to put out BIOS fixes.
Summary: Expensive when loaded, coulde've got a MID-Range server.
Pros: Look at the specs carefully, and check HP's spec sheet, This product is by far a very good, product, but at cost. Starting price seems affordable but when you pack it up, it's no entry level, server cost. Over all happy with the build, and looks. Very quite, has lots and lots of features, HP's IL...
Cons: Don't bother with the so called built in Raid Card, it's not a hardware raid it's a Software Raid, thur the bios to act like one. Very basic, not much you can do there. Won't allow Win7 to activate once installed, or any other OS that's not certified for. I had to buy HP's P410 256GB, Smart Array...
Pros: I just load WHS 2011, which was bundled, onto the system. This is a great machine for the price. It is very flexible, for configuration. You can add redundant p/s, it has 4 pcie slots. And it is relatively quiet from across the room. 8 ext & 1 Int USB2 ports.
Cons: No eSATA port & no USB3 port. But, you can add a card in an expansion slot.
Summary: I don't mind that the RAID controller is fakeRAID, but I am running a LAMP server, and am forced to run it using Ubuntu's software RAID. Not a huge deal, as I have additional methods of redundancy in effect.
Pros: Nice hardware for the price. Fairly expandable for the form-factor. Very quiet.
Cons: Would have been nice to have 2 drive caddies included, though I understand that some buyers would not have a use for them. Also, I would have appreciated better driver support for the RAID controller.
Summary: If you use one of the motherboard network ports for iLO (what HP calls shared mode), you can still use it for the host operating system but don't try to use port-channels (aka LAGs or etherchannels) or you may lose access to the iLO.
Pros: This server is very quiet, with low power consumption. I am using it as a lab server for ESXi 5.0 and it works splendidly for that purpose if you've got external shared storage (NAS or iSCSI). The RAID controller isn't supposed by ESXi but you can still attach SATA hard drives without RAID support.
Cons: HP iLO 3 is a great feature to have but the basic version doesn't allow you to use virtual media. You also can't use the remote KVM once the operating system boots. HP requires a license purchase to enable the full functionality.