I have, primarily because if you have Serana in your party (even if she has been cured of her Vampirism) - it removes the "Damage Health" effect that's added to the Vampiric Drain spell, basically turning your offensive magical abilities into absolute trash. However if you're willing to "get rid" of Serana (who is *one* of the best followers in the game, provided she actually has all of her magical abilities at maximum level) then everyone is right. The Vampire Lord is more versatile and overall, far stronger than the Werewolf.

However, with max totems of hircine (the companion quests) and using I *believe* it's the totem of brothers or something ? (the one that lets you summon wolves when you use your howl) - you're able to summon werewolves to your side which statistically are better than the summonable gargoyles.