It needs to be improved.. its a good idea but is not a good software yet. Synchronization is still too slow and bug sometimes. I guess it caches. I needed to reload the document but there's no way to refresh it. Saved as another file but I couldn't sync anymore.
It's a very helpful app but the lack of font support makes it kind of useless. It doesn't even support basic mobile fonts which is really frustrating because you can't really see your design as you intended. Until the font issue is fixed, it's not as useful as I would like it to be. Edit: I get licensing issues for paid fonts but what about free ones? Fonts like Roboto, which is a default on a lot of phones, don't even show up. As for their USB solution, not everyone owns a Mac so it's not very helpful at all.
It's ok but not being able to use not system fonts is annoying.
It's incredibly useful to wirelessly sync these files with your mobile device. And the support for Creative Cloud is extra helpful when sharing designs and prototypes with other team members. However, there are two glaring caveats that must be mentioned. One is the lack of font support. Even the majority of web safe fonts are not supported when previewing these files. It will definitely make your designers agnostic when choosing serif and sans-serif typefaces. The second is the performance while viewing a prototype on your phone. While page transitions are smooth, scrolling is at a very low frame rate. This can create negative impact when demoing for a client, or conducting user tests. (Update: This was recently fixed in the latest version update. Thank you for the improvement!) Lastly, as other comments have stated, the live preview is only available when using XD on a Mac. I've never found that to be incredibly upsetting since everything automatically syncs with Creative Cloud every time you save.
The app is useless on my phone. I can log in but I can't do anything after that. Unresponsive.
Great app. I like the way I can see the prototypes on my phone. Well done Adobe.
Bug fixes and performance improvements