Yups. Loved it to bits. As a Forsaken (at the time), I cheered as Bolvar led his warriors forward. I cheered louder when Saurfang jr. joined in. I held my heart when Saurfang attacked Arthas, and I aww'd when he got instagibbed... I worried for Bolvar's safety (come on, Blizz, Bolvar is one of my favourite faction leaders! After killing Saurfang jr, don't take Bolvar away!), and then the Forsaken appeared with their dread machines, and I thought they'd save the day...
And it turned out they weren't the Forsaken at all, but some fel-corrupted spawn of demonic evil that stabbed 'us' (Horde and Alliance) in the back. It was a 'Wha..? No! Noooo!' moment if ever there was any.
And then we got to kill them all, free the Undercity, and be trash-talked by Varian. Epic quest-line, but come on, Varian... Honestly.
Wish Bolvar were still in charge of the Alliance.