Mile Hi Center is located inside the grounds of Camp John Hay, offering imported products at supposedly lower prices. We checked out the imported goods and don't think they're really priced cheaper there (although the dollar to peso exchange rate used in the grocery is lower at P41 then). Plus, we noticed that shops selling Buy 1 Take 1 stuff (like Skechers shoes) are actually selling the shoes at double the price.
Am sure there are good buys there though, if you know where to look.
We tried the Mile Hi Diner... and the verdict is, better eat at the 50's Diner if it's fries and burgers you're looking for. The fare and price, and service, weren't bad though. But it was pretty so-so.