Don't know about their particular recipe but it's as hot as you want to make it. Perhaps go light on the spices first attempt and maybe bolder next time you try.
Start mildish and work up to burning. Friends of ours went to live in Mexico and went regularly to a local restaurant. After they been a few time and got chatting to the owner he told them that they gave new, pale customers mildish food and as they tanned they upped the heat!