After doing a ton of research I've heard a lot more good about their kits than bad. I don't think I have read a single first hand account of anyone breaking a crank, or rod.
I purchased their 400-512 kit with upgraded I-beam rods, 7/16 ARP bolts, and 14:1 compression. Everything looks first rate..It will be quite awhile before it's running, but I believe I have an excellent bottom end to work with.