Pros: This is a nice drive bay, both compact and easy to install Super convenient to be able to mount and dismount drives without opening your case.

Cons: You may have a semi-loud whine when the PC is powered on. *see 'overall review' for fix

Overall Review: The noise is coming from the units pre-installed cooling fan. I assumed the fan had a defective bearing, and intended to replace it. What I discovered after removing the two mounting screws was a plastic 'web' between the fan and the chassis. I assumed it was for structural support to stiffen the fan mount location. However this 'web' was so close to the fan blade, when assembled, it actually caused a vacuum dam at the hub of the fan and caused a higher load on the fan motor as well as restricting air flow (therefore causing the whine). NOTE: the following instruction will likely void the manufacturer warranty on this item. My solution was to carefully remove the web by trimming each of the 6 legs at the outside of the web. I then mounted the fan with the 2 screws and turned my system back on. Beautiful silence. Also, if you feel the airflow before and after this modification, you will notice a 50% increase in volume.

Pros: -Solid build quality -Love not having to mess around with drive trays, just slide the drives right in -Uses standard SATA power connectors(2 of them) -Good airflow

Cons: Sleeve-bearing fan instead of longer life ball-bearing type.

Overall Review: Fan is 80mm x 20mm, not 70mm as stated by manufacturer. (Young Lin model# DFC802012M) I wish manufacturers could get the specs correct for their own products...

Pros: Love the trayless nature of the product. Boy am I tired of messing with trays for my older PATA drives. I recommend their 1-drive trayless SATA rack too.

Cons: Connecting it to power is trouble. My case's power supply only provides two Molex disk drive power connectors and the case's air ducting left very little room for cables behind the drives. There isn't room to put splitters there, I'd have to build custom power cables (with LONG wires so the Molex connectors can live elsewhere) to make all 4 drives work. It would've made a lot more sense to backplane the drive power and LED power within the rack itself, with ONE power connector, rather than power-cabling each drive with the supplied custom splitter cable outside the rack. Also, there is no control over drive spin-up in this rack. If all four drives try to spin up at once, your power supply had better be hefty. SATA spin-up was botched in the standards committee, so everyone does it differently. In theory, drives will only spin up when their SATA interface is touched for the first time, so if your SATA BIOS does power sequencing, it might work fine.

Pros: This is an absolute must for anyone running a file server. I have two of these in my Windows Home Server and am looking to add a third to complete the set. Holds drives nice and secure and runs a fan for cooling a pair of drives. Status lights show when drives are power and when data is being actively read from them.

Cons: Not integrating the power for the drives and lights into the rack itself made wiring a little messy. My PSU only had 6 Molex so I'm running each rack off of a pair of molex splitters. Makes a ball of wires about the size of my fist in the bottom of my case. Other then that a solid product.

Overall Review: I haven't had any fan issues like other reviewers mentioned but if a little fan that needs to be replaced is the worst thing for this rack then I'll take it. The wiring can be a pain but its not too bad if you are a little patient with how the cables are going to lay and where your tying them off in your case. This would be a welcome addition to any file server as it makes drive upgrade and replacement so much easier.

Pros: Affordable, Trayless, Cooling fans.

Cons: each port ties up a molex connector.

Overall Review: Could have been designed better by building in the connections for the front display activity lights and using sata power connectors instead of 4 molex's.

Pros: I bought a case with 7 x 5.25" bays, for two of these units, (1x4-bay, 1x3-bay) and it does exactly what I wanted. I just needed a rack to put several SATA drives in that allowed for easy access - and not have to take the case apart all the time to get to them. I don't know how the RAID services work with this box - but if you just want several HDDs with incredibly easy access - this product is just what you are looking for!

Cons: The doors seem somewhat flimsy, though I have had no problem whatsoever with them.

Overall Review: I recall reading some reviews that said the supplied cables were confusing/hard to setup - I don't know what they were talking about. The setup requires 4 MOLEX power connectors & 4 open SATA ports - it comes with the appropriate Y-adapters for power & HDD activity LEDs to work.

Pros: easy install, fits right in 3 empty drive bays, all the connectors are included. Wish I had 3 more bays open I'd get another. Hard to work with the drives inside the case and I have a full size tower. This makes it so much less crowded inside.

Cons: none

Overall Review: Someone said they had trouble connecting the lights. This is not so, it comes with small 4 pin connectors that are attached to the supplied power cable ant they simply plug in to the back of the unit, very easy. You do need 5 4 pin connectors for power. But this is so easy and makes changing a drive simple. I have 3 500 gig raids and one of my WD drives failed after two years, so no data loss and now easy to switch out. Literally just open the door and slide the new drive in! Get this you'll love it.

Pros: Very simple. Fit and finish was excelent. The doors open/eject drives nicely, and close shut well. Fans nor power LEDs do not turn on if there are no drives in the unit.

Cons: The connection for drive activity LEDs took some work. It is an 8 pin header (2 pins per LED, 4 total drives) and it is also recessed within the unit. I used an old 10 socket connection from a 1394 cable and cut off the last 2 sockets. Once that fit, I simply wired it to the RAID card LED pinouts, and all was well. Also, there are no LEDs for drive failure...only power and activity.

Overall Review: I used some LEDs I had laying around for failed drive status...just put them in the front of the case. Not all controllers have both activity and failure...but mine does. Despite what the other review says, you DO NOT need to use the supplied SATA data/power connection cables that come with the unit (they are bundled together and stick out the back- standard SATA power/data cables can be used). Also on those cables was what looked to be an LED header...but I'm not sure how that would work if it were connected to drive activity- needless to say I didn't use them.