I'm very surprised there hasn't been a review of this already.
Good screwless case, both sides can come away by squeezing in two sprung clips (good quality too). I fitted an SSD just to test it and the installation is simple enough with enough space. I haven't tested the eSATA port as yet but the speeds through the USB2 interface seem acceptable. Tests were performed on a lowly N455 Atom MSI netbook.
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CrystalDiskMark 3.0.1 (C) 2007-2010 hiyohiyo
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* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
Sequential Read : 33.212 MB/s
Sequential Write : 13.485 MB/s
Random Read 512KB : 28.765 MB/s
Random Write 512KB : 23.820 MB/s
Random Read 4KB (QD=1) : 5.035 MB/s [ 1229.2 IOPS]
Random Write 4KB (QD=1) : 4.234 MB/s [ 1033.8 IOPS]
Random Read 4KB (QD=32) : 5.079 MB/s [ 1240.0 IOPS]
Random Write 4KB (QD=32) : 4.610 MB/s [ 1125.6 IOPS]
Test : 1000 MB [F: 0.0% (0.0/55.9 GB)] (x5)
Date : 2011/12/27 19:51:30
OS : Windows 7 Starter Edition SP1 [6.1 Build 7601] (x86)
(60GB OCZ Vertex 3 SSD FAT32 500MB/s capable)