I did mine a couple of weeks ago.
Iam a VW/Audi/Seat technician and i found it a fiddle, gear boxes are generally easy (in fact ive done 2 touran's today). Alot of crap on the Cupra to remove before wiggling the box out, and the engine needs to be held towards the front of the car, i used the jack out the back of my car, against the subframe and engine block.. Not a easy job for you to do, especially if you haven't got a ramp. Personally i wouldn't let anyone else exept a select few work on my car but i would have payed to get that done. Twas a sh*t