Does anyone have one, or any experience?

Ordered one off Rolf from Germany 13th November, still not received it!

Worth the £20? 

Yep, if you have the tech know-how to use it.

Works well with Navcoder

I also used it with my CarPC, communicating with the iBus to use the head unit buttons to operate the CarPC (an old Acer Netbook running Linux) .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

I've done some research on it.

I literally wanted to it to set the clock and make something up to reset the mpg as I can't get hold of a genuine stereo!

And see what other I can blow ip 

I use one of these... saves hacking in to the ibus

http://www.ebay.co.uk/itm/OBD2-for-BMW-Dia...Sw4HVWC4tP Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!

What sort of functions does it have?

I'm heading to Frankfurt way in the FF early January, maybe ill pickup ? 

It allows you to connect NavCoder without all the messing about, you just plug it in the computer and the obd socket in the car (top of pocket under light switch) The lead did come with some BMW software, but I've never installed it, I just wanted to use it to connect NavCoder.... which is free to download and look at...but, you do have to buy a licence to talk to the car....

That interface that your looking at doesn't have any software, you need to either write your own or buy a NavCoder licence  Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!

FYI that link was an example... you can get them in the UK as well, just couldn't be bothered to wade through fleabay  Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!

Will have covered it somewhere in here:

http://www.fullfatrr.com/forum/topic8786.html?highlight=carpc .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Just FYI you can reset the clock to 12 by pulling the fuse, a battery reset will reset the MPG as well although I wouldn't bother as it is so inaccurate it's ridiculous... just pluck a number out the sky and you will be closer to the real MPG......  Pete

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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
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