Prestan Infant Ultralite CPR Training Manikin with CPR Feedback, 4-Pack, Medium Tone

I own around 20 sets of manikins of all major brands, and these I will say are the worst.I have other Prestan infant manikins (their "normal" ones) and I absolutely love them! Prestan's regular infant manikins are great quality - but heavy. With that, I wanted to lighten up my load and with liking the Prestan brand I had ordered a set of these.Things I like about these:The overall size of the travel bag is awesome! It's less than half of the size of the Prestan 4pk bag of traditional infant manikins. Great for traveling!I like that I do not have to assemble them like I have to do with the Prestan lightweight adult manikins.I like that they have an audible "clicker" indicating the 1.5" compression depth. These also come with a battery powered compression monitor (haven't used that, so I can't comment on its use).Things that I dislike:Their faces are hard plastic and with the large (er than it's face) face shield lung bags, the combination makes it almost impossible to use a BVM. Before starting I really have to poke my finger into the opening of it's mouth to try and get the lung bag to be an open airway for ventilation. Even with that they're almost impossible to ventilate.I dislike the tone of the compression depth clicker. With the hollow back baby, and on a hard surface, the click sound is loud and ear piercing. Especially when they're all going at once!I dislike how sharp the edges are. They hurt your fingers when you're holding the airway open while doing a "c clamp" bvm hand position.Have fun teaching students how to take a brachial pulse when it doesn't have any arms. Or to tap the bottom of the foot when checking for responsiveness when it doesn't have one of them either.Doing infant choking relief on these manikins is a joke too. You can barely do the back blow portion of the technique because these manikins are frail! I barely touched it with the heel of my hand and the thing fell apart (back plate and chest plate came apart) Oh! And they're sharp to hold when you're hand is cupping the back of it's imaginary head.All these things that you don't think about when you get caught by the siren of them being lightweight.I'm not sure what Prestan was thinking when they created these manikins other than the consumer lure of being lightweight. Cause frankly, that's about all it has going for it. I highly doubt these infants (or the lightweight prestan adult manikins) will last anywhere near as long as traditional manikins.In the end, they're extremely overpriced for what they are.