I am glad it is both of them.
I think Alonso is a good team player from my observations and the two of them should work well together as they are both mature logical people.
I am more surprised that Alonso went back to McLaren after the famous way it fell out last time with the spygate scandal but that shows he is pragmatic and mature I hope.
He drove the wheels of the Ferrari last year and his consistent points score should work well for the initial development of the new car/engine.
Not certain what to expect from next year. Certainly not an engine note to match our Mogs and sidepipes. The Coupe sounds better than all of them put together.