Well....I mean everything that could be said about this has pretty much been said already, but what the heck:
First of all, there's no doubt for me that it's a really great logo: It's simple, but with lots of complexity and a variety of elements that you're only gonna notice when you spend some more time with it. The black and white stripes, the Scudetto badge, obviously the J, even the basic shape of the horse...
The crucial question is of course whether it's a good logo for a football club, and whether you like the whole change in branding the club is taking with this. For me, it's alright. But that's mostly because for me, most of the old-school football romanticism has been dead on the very top level of football clubs for quite some time anyways. All the attempts by the clubs to try and make it seem otherwise aren't anything else than what this new logo does: A marketing campaign and branding. Just in another direction.
Now whether the whole re-branding will work in a commercial sense, I don't know. But imo it could easily work out quite well, and we simply have to try something to drastically improve our commercial revenue - because we can't really improve our matchday revenue or broadcasting income on our own, and if we just continue going as we've done the past few years we'll fall behind further and further.
In that sense, I congratulate the management for the step.