I did try to warn people in an earlier thread about the season ticket offering last year, that it's hit-or-mainly-miss, especially with the Victoria works until November 2014. I used to travel into Manchester daily on it, but have found it quicker and cheaper to drive and park.
Unfortunately Metrostink sounds like it should work fantastically, so people flock to it. After a few goes on it, people begin to realise how unreliable it is. I've never known a mass transit system have so many 'medical emergencies' to bring it to a halt. Maybe it'll improve after November, but I wouldn't bank on it.