I played pretty much my entire life in lacrosse elbow pads. I used them in college club and never had an issue. Over the winter I fell just right on my elbow, and I must have bruised it pretty good, because it hurt for two months. I still continued to wear them. I just really wanted to try these out after reading up on them. If these weren't as mobile as they where I would still be using the lacrosse ones.
For what its worth I have tried on a bunch of hockey elbow pads through the years most recently APX 2, MX3, Nexus 1000, Nexus 8000, RBZ, T90, and I will say none of them compare.