{Let Me Know} Is Mercedes Lackey's "Arrows" Trilogy Worth It?

Not too much to add here that hasn't been said in the video.  LOL.  Heck, the title alone, right?

Anyway, books and such mentioned (all links are Amazon affiliate):

1.  By the Sword 
2.  Diana Tregarde Investigates (Children of the Night, Burning Water, & Jinx High)
3.  The Complete Arrows Trilogy (Valdemar)