[MCRed]

Everything. The way debugging is integrated. Interface Builder-- nobody has anything like that to compete with it. It's totally integrated so you can really develop efficiently, and the simulator makes testing quick and easy.

I've never seen an IDE that was anywhere close. I suspect that people who hate Xcode are simply familiar with something else and find it frustrating to use it (though they've spent a few hours with it and hundreds of hours with something else they're expect it to beat their old IDE with no effort yet spent learning it.)

Seriously, Microsoft and Google can't even do a competent UI on applications built for consumers. Their developer tools are terrible by comparison.

[MrGando]

Are you kidding me? Look, I've been developing Mac/iOS for a while now (7 years). Xcode is mostly a piece of garbage if you compare it with the robustness of Visual Studio. I actually envy the MSFT developer tools, specially VS.

Google is another story though.

[Fargren]

I've used XCode for hundreds of hours. It's very lacking in functionality, I'm not going to copy and paste my other comment.

Interface Builder is very nice, I will give it that. I did have it break on me once or twice(wouldn't let met add a particular kind of segue), and having to manually edit the generated XML file was a pain, but still, it is better than most similar things I've used.