Rubbish, we've dominated nearly every team we've played in Serie A this season. Our cack finishing has fooled a lot of people into thinking our formation isnt working, which is clearly wrong, as we create plenty of chances every game. Also we look much more secure in defence and midfield with this formation.
I personally prefer the 4-3-3, because its a much more exciting and dynamic formation (for our playing personnel) but there is no doubt I feel our team is much more in control when we play 3-5-2.
Conte knows what he is doing.