Pros: - Included the 3x120mm fans bracket instead of the 4x80mm fans bracket that would have been useless to me. - All fans are in an easily removable caddy. Stock fans replaced with older Noctua models without issue. - Included an SSD tray inside, very useful for the O/S or a cache drive. - All drive trays are interchangeable with other Norco products (for example the RPC-2106 which I also own).

Cons: - Runs a bit hot. There's not a lot of room between the bays for air to go through. But bear in mind that I'm setting up my system, so a lot of drive operations like writing and parity creation. I think it'll be perfect once my system is up and running under normal operations. - Not a problem with the unit, but I just want to mention that with UnRAID, you can only have 1 array. So 24 drives including only 2 parity drives, isn't what I had in mind (more like 1 array of 12 drives and 2 arrays of 6 drives with 2 parity drives each probably). I didn't know this limitation with UnRAID. I thought it was worth mentioning.

Overall Review: 4 eggs, cuz 5 would be perfection. Is this really perfect, probably not, so gotta leave some room for improvement.

Pros: - Work as advertised with RPC-2106 and RPC-4224. - Only 1U, so if your server is 2U-4U, you have room for a cable management arm above the rails.

Cons: - Not long enough when extended. Leaves about 5" of the back end inside the rack. Not a deal breaker, but disappointing when I see my Dell R510 extend all the way. Bear in mind that the Dell rails are a lot more expensive. - Can't be used with a cable management arm on the same level. Not a problem for me, my servers are 2U-4U and the rails being 1U, I always have at least a 1U space above the rails for the arm. This could still be a useful information to know for someone else.

Pros: Works like a charm with UnRAID so far.

Cons: Card AND cables are expensive