What's your opinion of slow-mo in action movies?

Effective in Butch Cassidy & the Sundance Kid.

 

Really lame, it was cool at first but it's been so overdone.

 

I heard Sharon Stone holds record for most paused scene. if that counts?

 

Like most filmmaking techniques, it can be a great way to enhance a scene in the hands of a competent filmmaker, or it can be an overused distraction when employed by a less than competent filmmaker.

Slo-mo isn't inherently good or bad. It boils down to whether or not the person using it knows what they're doing.