Although CNET hasn't reviewed the Samsung BD-D5700, we have reviewed the step up.
The BD-D5700 lacks a few features compared with the BD-D6700, most notably 3D Blu-ray compatibility, dual-HDMI outputs, and onboard storage. Also note that the BD-D5700 does not have onboard decoding for DTS-HD Master Audio or DTS-HD High Resolution, although you can still take advantage of those soundtrack formats if you have a receiver with the proper decoders.
Without performing a hands-on review, we don't know how the BD-D5700 will perform in terms of disc-loading speeds and image quality, although we'd note that virtually every Blu-ray player offers identically excellent image quality on Blu-ray movies these days.
The BD-D5700 features Samsung Smart Hub streaming-content portal, so you can get a very good idea of what to expect by reading our, as well as our .