I have tried both units. The Aios was sent back to Amazon for a refund when it started rebooting itself every 5 minutes. It had good specs and a lower price than the kdlinks HD700 which I ordered to replace it..
The HD700 function is very similar to the Aios, but no jukebox-like interface. It has a simple file browser interface for USB, UPnP and Network devices, but also includes the capability to manipulate files (copy, delete, rename, etc.) It can share the USB devices on the network. It has played all file formats that I have (avi, mp4, vob, mkv, iso, wav, mp3, flac, wma, divx). I don't have 3d so I haven't tested that, but it can do sbs or top/bottom modes. Wireless adapter + antenna is built in. HDMI out was easy to set up. I control the device from my Harmony 1 remote with no issues. 4 USB ports (though it doesn't seem to like exFat devices).
Some (of what I consider) unusual features:
Chinese apps built-in : apps are mostly useless, but things like YouTube do work. Good if you want to stream CCTV.
A DTV interface (apparently for a connected USB tuner) to watch and/or record TV(?)
Can be setup as a virtual access point for wireless with it's own security & password
Run an app like Skifta on your portable android handheld or tablet and media played just pops up and plays automatically on the HD700
Plays Bluray and DVD iso menus
On ripped video you can select audio track or subtitles from a pop-up menu
Channel up/down on the remote pages up/down in the browser, or prev/next chapter in video file
SATA power&data ports on the side to attach a hard drive
Timeseek function is used to jump to a specific chapter or play time
Best feature: streaming video from either NAS, USB or other android devices
Needs improvement: Sorting defaults to by date. Sorting option is universal not by device or folder. Web browser is useless. Thumbnails can be used but then names are to big to read.