I recently got a Technicolor TG589VAC V2 (the all white one) from my favourite auction site for £8.35 delivered!
It's an SSE version but was easy enough to configure for my BT line.
It's been on my line a few weeks now and here are my thoughts on it.
It's Broadcom based so gets on well with my Huawei cabinet.
Connection speed is pretty good - it connects about 1Meg slower (DS) than the Zyxel 8924 I was using previously - and has been stable.
Wireless (2.4 and 5GHz) seems about as good as the Zyxel.
Nice range of stats available in the GUI (line stats, G.INP stats, bit-loading graph etc).
Full stats available in the CLI.
The not so good:
The GUI is the usual Technicolor nasty slow affair (see pic below).
CLI is only available via SSH (no telnet) and is a Technicolor cut-down version (pic below). It does include a useful drink recipe when you log in.
Its physically rather big - it's so deep it only just goes on my windowsill.
There's no way to turn off all of the flashing green lights.
As usual with Technicolor there doesn't seem any way to get new firmware versions (I have 16.1 but I know that 16.2 is out in the wild).