Fabulous very classy Worst part is, their technical team is so INEFFICIENT that they were not even able to find the issue, let alone the part where they can fix it. And bought 3500 pairs of these bad boys to sell them at a 200% markup and retire to a beach in the Bahamas. Pues no hay mucho qué decir. the foot bed is extremely comfortable, cushy and sinks wonderfully, but maintains all support, including the heel! Packaging is the same as the 250, and I think they include everything in the packet that you need. I finally had the opportunity to put these on and go for a run. be careful opening the padded envelope they get mailed in, in case the 3mm crystals are loose like mine were. No thanks. However, even if the pieces have no markings, they can easily be identified by the illustrations of the assembly instructions.