On a recent OK multi-stop itinerary, my bag was delayed in transit (it did not make my connection flight in PRG).
I got it a day later, and two brand new bottles of cologne were missing from it.
I reported it to OK, and about 20 calls/e-mails and 3 months later, got 90% reimbursement (something about them having a 10% depreciation policy - even when the goods were brand new).
In addition, I received about $25 less than they promised me - I believe their bank took a fee for the transaction. I know it wasn't my bank's fee, since my bank tacked on a separate incoming wire fee.

In all, it was not a plesant experience. Sounds like I'm not the only one who's had problems with OK luggage handlers...