CPR is a mainstay of any paramedic's career, and training on CPR manikins comes every year whether we need it or not. When you do the job as long as I have, you get lots of opportunities to compare the training tools to real life. There is definitely a level of realism that comes with price. Whether realism is as important as cost is something you'll have to decide for your own training program.
Plastics - ISO 9001:2008 & ISO 13485:2003