Josh must be superman or the best gamer in the world to have completed this in a couple if days. I went straight for 'career' mode which took me hours to even win a match, I admit I aint the best, but my problem was during bouts there wasn't much info on what you have to do. A tip: always look at your stamina on the left, below the calendar, try to keep it near 100% before the fight.
My fighter was Muay thai, but I wasn't able to kick the head of my opponent which frustated the heck out of me. It was only after 20 bouts I realised that if you gat an invite from coaches/signings or photoshoots, YOU MUST LOOK AT YOUR CALENDAR BAR, IT GOES GREEN AND THERE WILL BE A PICTURE OF THE OCTAGON/PHOTO OR SIGNING,THEN HIT 'ACTION'. Once you get 150/150 in TASK, you can now kick heads!
Learn to grapple, because you will lose so many bouts by being pinned down, sometimes you just can't get out of the grapple (even in training, so annoying).
The game will keep you busy for weeks. it's similar style to Fight night round 3 with a twist, just a shame you can't skip/speed up the training. Apart from that everything's great, even though i've only tried career!
Little tip: get those left jabs and right hooks.