My 50% order arrived yesterday. I had tried a pair of the Surgeon RX3 elbows, the RX3 shins, and the RX3 shoulder pads.
Initial thoughts:
Shipping was very fast, build quality on all the product seems quite good on first inspection, and sizing strikes me as consistent with the charts on the site (and also fairly consistent w/other manufacturers, which is huge given that there gear can't be tried on in stores). That said, I have mixed feelings about the pads themselves.
Elbows: my favorite of the bunch. Quite flexible and more comfortable than anything I've tried on other than Warriors. And, unless I'm mistaken, they're a bit shorter than the Warriors, which is a plus for anyone worried about potential issues w/glove mobility. I particularly liked the 360 strap on the forearm, although I do have some worries about how the sleeve will hold up.
Shoulders: These were the big disappointment for me. I was hoping for something a bit more protective than 5030s or one of the "classic" pads, but that still was light, comfortable, and flexible. They were light and relatively low-profile, but I didn't find them particularly comfortable or flexible. Something about the way the shoulder caps were attached made it uncomfortable for me to raise my arms.
Shins: Unfortunately, these are going to be a return for me. They're light, relatively low-profile, and seem quite protective. Fit was solid, but to OldCY's post, the calf pads are massive. I have skinny calves, but the calf pads are huge and quite inflexible, so I only would recommend for folks w/larger calves or who would be untroubled by a pad that sticks out substantially in back.