A little cramped inside. The trick is to remove the front panel out of its slot before attaching the power and data cables to the drive. That gives you a little more working room. Then you can slide the drive in where it needs to be before re-installing the front panel. With a little trial and error, I had a 250gb SATA drive working in about 15 minutes. Nice aluminum interior/exterior and lots of vent holes for cooling. Seems to work fine.