Looking to buy a cross trainer, but not really sure how good some of the ones I've looked at are. For example: http://www.argos.co.uk/static/Product/partNumber/3358223.htm This one is a 2 in 1 cross trainer/bike, better than half price too - seems a good deal. Would the quality be compromised by the fact it's dual purpose or is there no reason it should be? Any advice would be greatly appreciated!