Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Causes laptop to kernel panic

I bought this thinking it'd be a good way to save on precious USB ports and a quick way to transfer photos from my DSLR. Unfortunately about two-thirds of the time it causes my laptop to kernel panic when I first insert it and I have to reboot, losing any unsaved data.After a reboot it performs okay but speed is highly variable and so it's hard to rely on, particularly in high pressure situations where there isn't time to just leave a laptop standing while photos import.The idea's good, but I'd steer clear of this product in future.