PWX-Z90 Does Offer MP4
 

Sort of.

Now that I got you attention. The Z90 offers .mp4 in the form of proxies. Thats helpful for me at least is because on my phone, its impossible to work with .mxf files. There is a quick work around, I suppose, which I figured out. The app I use has a "FAST' method that does not need to re-encode. So seeing that the MXF files are inherent H.264, i choose this option and the program outputs it in .mp4 and now I can use it on my phone to do editing. What I found out also is that I cannot edit files that have HIGH 4:2:2. But I can do files with 4:2:0