I have a MUT 3, yes it works... but doesnt do anything additional that the openport cant do.
Only extra thing you can do it diagnose climate control and reset/clear SRS errors.
Otherwise openport is the better option.
MUT3 cannot reflash as easily as you need the ROM packs... and even then will be the stock ROMs.
Openport will let you reflash anything you want with ECUFlash (including modded roms)