[Galaxy Note 10.1 Q&A, Help & Troubleshooting] tririver:
I just got the dongle. It works great!

A few comments:

(1) For rooted device (like mine), the app "triangle away" is needed. The dongle works after (but not before) I reset the counting using triangle away. For un-rooted devices (the device is un-rooted if you didn't root it yourself) it shouldn't be an issue.

(2) The dongle works with a hdmi-VGA converter. The one I bought is this:

http://www.amazon.co.uk/Cable-Matte...7O2U/ref=sr_1_1?ie=UTF8&qid=1358947513&sr=8-1

I am sure lots of other converters should work as well. But there may be two things to note. It would be safer if

(a) "Active" converters should have more chance to work than "passive" converters. There is an IC chip in active converters. The passive ones are just data lines.

(b) Make sure the converter does not need too much power to work. The one I bought is raspberry PI compatible. This typically mean the converter the current it draws from the device is not too large. In some previous post it is mentioned the dongle could reset when connected to VGA converters. I doubt it may because of too much power required by the converter.

(3) I didn't notice any lag or instability issues with 30 minutes of use (I installed a firmware update before usage. The discovery of update and installation is automatic. I just clicked OK).

I didn't (and will not) use it to play games or watch movies anyway. I only want to use it to do presentations via projectors. Games and movies transfers much more data, in which case I haven't tested.

I will update if I got problems using the dongle for a longer time.

(4) The "multi-window app" feature goes away when the dongle is connected. (It re-appears after disconnection.)

UPDATE:

After more test, there do exist a few problems:

(1) If I play a video in full screen (both youtube video online or downloaded videos using MXplayer), the video is only shown on external display. Even worse, when I exit the full screen mode of the video player, the allshare connection typically crashes. I need to go to settings to connect again (no reboot needed though).

On the other hand, for youtube without going to full screen, there is no problem. And when I compare the two displays, there is no lag between them.

(2) In polaris office, only the "primary display" mode works well. In other two modes, the external screen only update partially.

Both of them should be software problems. If I don't do (1) of the above, I never met crash or disconnections. I didn't test the device with games. There is no random disconnection so far (this is most important for me).

The connection is stable within 10 meters, while it breaks at about 30 meters (together with 2 doors blocking the space).

Finally, there is a drop of display quantity if the image is quickly changing, and I watch closely enough. But considering I only need to display static images, this is not a problem. The display quantity of static images is great. Compared with the TeamViewer + computer solution, the dongle uses less resources on the tablet and gives much better image quality. The usage of battery is not heavily affected either. I used in total 7% battery power per hour for light usage of the tablet with dongle connection (and among which the tablet screen still used most of battery as usual).