Same positive experience here. I have used the BOGO cert for several suites at the Hong Kong IC, as well as the 4000 sqft villa in Bali with no problems.

I think this is one of the best aspect of ICH, the front desk employees have always been very pleasant when I hand over the BOGO cert at check-in. I have always been made to feel just as welcome as if I was paying the regular daily room rate for the suites.