http://alteon.sigmaraviation.com/assessmentdates.0.html
Looks very expensive for what you get. Assuming you successfully complete the course and get an offer with Mytravel you then have to pay all of your living costs at home base over the summer - however long that lasts (3-6 months is my guess). In return you get 40 hours a month which isn't really a lot considering that they might decide at the end of the summer that they don't need to employ you. Most airlines minimum hours are 500 when you hold a type rating so you would be well short of this and might find it hard to move to another employer.
If you are hankering for an SSTR then I would say there are much cheaper options around with TRTO's that have proven track records of getting you an introduction into an airline that will employ you on a proper contract from Day 1. This stands for both TP and jet ratings.