I have personally used the monster medic core medic stretchers. They do not stand up to the hype. We have five stretchers and a stair chair. In five months we have had several cables break, a couple of wheels break. Meaning the bolt that hold them in place snapand the wheel mounts have broken. And they have even started to fall with patents on them. They have started falling even without patents on them. Monster Medic has come out and replaced the carriages and we are still having problems with the product. The only good thing i have to say about this stretcher is the fact that the head of the stretcher slides in instead of folding down. But that does not even begin to make up for the flaws in craftmanship. I do not like them due to the fact that they are not safe and are very combersom when working in tight places or in an emergency situation. While in use at a transfer station they had little problems, but for an emergency station i would not recomend them.