I had the key in 4-go and without hesitation I go to 16. 4 is still functional, despite shocks and others. Same therewith. The flow rates are faster compared to key "no-name" trade (for searching one can find 16 keys go less than 20 but hello flow and quality ...). And indeed it works in ready-boost. I have detected no compatibility concerns, whether with a PC, Freebox, a Wii, my Sony Bravia TV and so on. The only problem inherent in this model is that the cap is lost very easily, because often a key can stay connected longer, either for ReadyBoost or to play back pictures on the TV, etc ... and his pudgy appearance (for anti-shock) can interfere if another USB device is connected to a nearby port (for example if the Wii was the key to a port, you can not connect anything else to the second port as the network adapter RJ45 for example), unlike other wrenches. So be careful, to be considered for some users. You will say USB ports only be expected to be further away ... or you can use an extension cord and plug the key, but hey, I think Corsair could have made a shockproof suitable key all situations, where the fifth star I remove him.
