Actually Enrich Miles claim from MAS is sometimes kind of tricky as one still need to pay for taxes & surcharges, which can be exorbitant.

I had claimed 3 return business class tickets for domestic destination in Sabah during the late 2012 Enrich 50% promo, it turns out I need to pay additional RM 600+ for all the taxes & surcharges. As a comparison, I bought another (not claim from Enrich Milles) 3 return economy class ticket to similar destination in February 2013, I only need to pay RM 300 for everything.