I bought due to positive feedback in terms of PVR capability for Samsung D-Series TVs this stick. I personally own a Samsung UE40ES5700 and was not disappointed, fortunately. All my other USB flash drives have been classified as non-compatible device from Samsung but it recognized immediately as well and also works with HD recording and Timeshift wonderful.
So if anyone is looking for a PVR USB Stick for Samsung LED TVs, it is very well advised with this stick!