I recently purchased this pack of four manikins for my safety training courses and I'm thoroughly impressed! As my tests showed, they are incredibly lightweight and easy to transport, which is a huge plus when you have to take them from one location to another. The feedback feature on the chest is also a great addition, giving trainees real-time feedback on their CPR technique. My only con is that the faces do not have realistic features, but that's a minor issue. Overall, I highly recommend these manikins for anyone in the safety training industry.