I bought two last night at Best Buy as they have them for half off right now ($30 instead of $60).
I have had nothing but trouble with them. Initially i was able to connect with my 1520 running the developer preview. I then tried to connect my surface pro and the screen would say "connecting to surface pro" and then go black. The TV was still on and my surface pro showed connected but nothing would come up on the screen. This happend for several hours while i did some troubleshooting.
To make a long story short, apparently both my less than 24 month old TV's have an issue where once you connect, you have to refresh the HDMI port to get it to display a picture. I have to connect through the adapter, then switch to a different input, and then switch back to HDMI hopefully before it disconnects me. Annoying enough that I may take them back as my original intention was to stream live TV from the XBOX One through the smartglass app so i could be ready for when Microsoft ditches Windows Media Center completely.
There is another issue with this if you connect with a windows phone. If you connect to live TV with the smartglass app, the TV will play vertically through the adapter. Apparently, it auto rotates a live TV stream on the phone, but the adapter still thinks its vertical and I haven't been able to figure out how to change it. I'm going to try smartglass through an iPhone and apple TV to see if it sill displays vertically tonight.
I think i might just go back to Windows Media Center until it dies for good.