It's been the only show I watch regularly each week - more than once per week, sometimes I like to catch the repeat that AXN broadcasts in a marathon-esque row with CSI: Miami and CSI: NY on Sunday nights as well, LOL - unless you count football (as in soccer) matches. Grissom is my absolute favourite character, but I don't like Sara.
This miniature killer arc is even more killer (excuse the pun!) than previous ones like the Paul Milanders arc, IMO, if only because the episodes for the rest were spaced out or solved fairly quickly; but this one, you're reminded of it every week!