McDonald's has released two new sauces known as Sweet & Spicy Jam and Mambo Sauce. I'm not sure how long they will be around as temporary flavors happen often. That said, I tried both flavors and have opinions--as always!
I first sampled the Sweet & Spicy Jam with some nuggets and liked it quite a bit. As it is jam that means it is obviously thicker than a, "True," sauce. That may put some folks off but I dug it. There is a delightful sweetness and a tiny bit of bite to the jam. Apparently, McDonald's intends this to be used with breakfast items too, and I could see that working well. I'd give it 5 out of 5 stars.
The Mambo sauce is fine, but a bit of a comedown compared to the delicious jam. It tastes like a spicy barbecue sauce and little else. Funnily enough, the Mambo sauce is spicier than the jam with, "Spicy," in its name. This sauce actually really hits you in the mouth, which is one thing I'll give it credit for. Otherwise, it is somewhat mediocre. This rates 2.5 out of 5 stars.
In conclusion, the Sweet and Sour flavor of the sauces will always be my favorite at McDonald's, but I can appreciate when other tastes are attempted and I'll be going back for more of that jam!