Fitted one to mine, once on the car looks identical to Genuine Audi.
Although its not really noticible, the spoiler is made of fibreglass unlike Audis which plastic, fibre glass is always ever so slightly less smooth - but you need to almost get out a magnifying glass to notice! Had to do a bit of paring with my penknife and some sandpaper to get the edges perfectly flush with the car panel.
Got it sprayed and fitted for £100 locally.
Delivery time was fine but what can delay it is payment by your bank. You can not pay by credit card - you will have to get your bank to lodge it into their account, ask whether your bank will charge for this.
Advice: If you are willing to wait and look out for a genuine one on ebay then do, otherwise the above is an alternative.