This is a highly recommended place to stay if you visit Berlin. A extremly nice place well handeled, clean, fresh and well located with a really nice and professional hostess.
Will absolutly stay here again when visiting Berlin again.
Only "downside" which isn't a provlem is the neraby airport but planes stop flying in the evening so this is not a issue according to me.
100% worth the money and in level with any 4-star hotel I've ever stayed on (not a hotel tho).