I ordered a large quantity of maps, which had to be special ordered from abroad. A delivery time of 3 weeks was given. I finally cancelled the order after 3 mos. of waiting. At least they don't charge the credit card until and unless the items are actually shipped.
My general opinion of OMNI is that they pose as professionals, but are really con artists. Just like their parent company, Eastview they purport to offer a wide variety of maps and atlases, but many turn out to be unavailable.