I have been using the Drake Elongated ADA for several months. Yes, it flushes like a champ, is difficult to plug (happened once...), and refills quickly. Solid waste DOES leave its mark, though. Another flush doesn't wash it away and it usually needs brushed.
Do any of the other models clean better while keeping the famous flush?
PS The flush is noisy but may be due to a 3" drain under the toilet that isn't vented well.