I just received the Sonnet Echo ExpressCard/34 Thunderbolt Adapter that I order last week, as well as a third party eSATA card and tested it today with my external hard drive. My initial impressions are mixed.
Overall, I'd give the adapter a B. At minimum, it should be about half as thick (or thinner), and should have a second Thunderbolt port to allow for daisy chaining. Nonetheless, it is easy to set up (just plug it into the Thunderbolt port), and it appears rugged and well-built.
- My first impression is that the box is much bigger than it looks in the pictures. It's about 4" x 3" x 1.5". Particularly next to my 11" MacBook Air, it looks huge, and with the 6' cord (unfortunately not included) it is a fairly kludgy way to add expandability to the MacBook Air (or 13" or 15" Pro that lacks an ExpressCard/34 slot).
- It shipped in one of those difficult to open plastic packages. It doesn't make for a great early impression.
- Given the size, it would be nice if it supported daisy chaining, but since it has only a single Thunderbolt port, this will need to be at the end of the chain (or your only Thunderbolt device.
- The list of "officially" supported cards is pretty small for now. Apparently certain cards need new drivers to work properly with Thunderbolt. My ExpressCard/34 eSATA card wasn't on the "official" list, but the driver installed, and it worked with the adapter.
- Once I got it set up, the ExpressCard eSATA port worked well, and I got similar speeds reading and writing to my external SSD (in the 120MB/S read, 75MB/S write range) in OS X on my Mac and Windows on my work PC. I attribute the speed to the cheap eSATA controller that I'm using, since the drive itself is capable of much faster speeds.
Overall, I'd give the adapter a B. At minimum, it should be about half as thick (or thinner), and should have a second Thunderbolt port to allow for daisy chaining. Nonetheless, it is easy to set up (just plug it into the Thunderbolt port), and it appears rugged and well-built.
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