It outperforms both systems (SBMT and Dress-LS) by the number of sentences which undergone at least one change (97.1% instead of 82.9% and 67.1%, respectively) and by the simplicity gain (+0.28 as opposed to +0.03 and +0.14, respectively), while achieving similar grammaticality of the output (4.34 as opposed to 4.28 and 4.27, respectively).
and lastly, we note the importance of keeping a reduced size of the vocabulary -no more than 50,000 words.