I received a UBD-KM85C instead of the K8500. Apparently, this is the Sam's Club-specific number for the lower-priced, but supposedly identical, version of the K8500 with the same specs, but they should tell you that before you order.
As for the unit, I bought it because my older Samsung UBD6500 would not show subtitles in Netflix. This one does, and seems to do a good job streaming via WiFi. I first had trouble with Netflix dropping out at random intervals, but after unsuccessful customer service calls to both Netflix and Samsung, I discovered for myself that if you are connected to a non-Samsung receiver (I have a Yamaha) via the KM85C's audio HDMI port, not using pass-through, the Anynet function gets confused and causes the problem. I solved this by disabling Anynet and controlling my components manually and individually. Not a biggie, but annoying. I also occasionally get un-synced sound with Netflix, but this might not be Samsung's fault. Not fully vetted yet, but so far I like the unit.