Bests & Worsts Reviews from Amazon

We've been using the previous model of these ultrafit drive for years as an easy way to add permanently-attached storage to MacBook Pros (all with USB 3.0+). Just plug it in, format it, and forget it. They always worked great and always performed well. We just ordered 3 of this new model (the 256GB) and noticed very slow write-speeds. Checking System profiler it's easy to see that the old model registered full-speed every time it is inserted, but this new model often reverts down to USB 2.0 speeds. We've tested all three drives and it's happening with all three of them. If we didn't desperately need the 256GB of storage in a tiny form-factor we would return all three of them. As it stands, the performance issue really won't be much of an issue (they mostly house lots of relatively small files), but if you will be relying on needing reliable USB 3.0 speeds you may want to look elsewhere.