I was finally able to go out and see it last night. Definitely going to need to see it again before I rank it in terms of the other MCU movies. I think my main 'problem' was that I saw it with my wife who is not a big fan of continuous fighting scenes, so she had pretty much checked out by the time they made it to South Africa...
*Spoilers* in my commentary.
I definitely enjoyed it and continue to laugh at the unexpected humor (e.g., Hawkeye talking about Quicksilver). But some of the opening fight scenes were too over the top/CGI for my liking (thinking when Cap throws the motorcycle). I know that we are talking about a Superhero movie though so I take that stuff in stride.
I thought that Spader was the perfect voice for Ultron. But not having been a die-hard Avengers comic book fanboy, the introduction of the Ultron project by Stark/Banner and then the realization of it in the movie was a bit too fast for my understanding/liking. It was as if the entire backstory of it had already been introduced in another movie that I had missed and I wasn't in on the information...
I'm going to miss having J.A.R.V.I.S. as the voice/operating system inside the Iron Man suits. Not sure how I feel about F.R.I.D.A.Y. yet and will have to see how things go in Cap 3 before I finalize that opinion.
So overall, another solid, entertaining and enjoyable Marvel production that I'm sure will rank high on my list once I've had a chance to dissect it over and over again.