I always book a compact with Sixt and up to now, as a Sixt Plat, never left any Sixt rental station with anything less than a BMW 3-series or Merc B/C Class.. two times even upgraded to a SLK cabrio.

And yepp, usually never using the 35% discount rate, but always one of the special promotions from their websites (including CDW) which always gave me a better price.

I've just made a booking for this special offer "car roulette", 150 Euro+service charge for 1 week incl. CDW "pay VW Polo - get VW Golf"... Will be curious what they'll give me (added automatic as preference.. ), but not expecting too much. Sixt customer service answered my email already that for this offer, the Plat upgrade would not be honored.. But we'll see...