I think mine is also having wlan problem. I just got this a week ago. The signal seems to get weaker and weaker and eventually, my computer can't even connect to it. A reboot of the router solves it for a while.

I'll ask TP-LINK support.

Hi guys, I would like to provide some progress updates here.

Since this post above, I called up the toll-free support line of TP-LINK. But after explaining the problem to the support personnel for a while, I decided that I didn't want to continue anymore and instead will pay a visit to the service center.

So I did on the same day.

I had a new unit exchanged, and flashed with the UNIFI firmware.

Once at home, I had it configured, and with a USB storage attached to it too. First day was good; second day was a Monday so I went to work and came back but after a few minutes of using my computer connected to its WLAN, the entire unit hanged. The unit had been up for about 2-day. What happened was that the SYS light on the unit didn't blink periodically, it didn't light up at all. IPTV wasn't working - the TV channel screen froze with a picture (NTV7 at time).

So I unplugged the USB storage stick and restarted the unit since Monday night. It's been the 6th days now and it seems to be still working fine. Hopefully it'll stay that way...

Have a great day guys.