Check out the SIRT, reviewed by David Crane at Defense Review.
"March 8, 2010
Recently, at SHOT Show 2010, DefenseReview got to view and handle what we believe could prove to be one of the most important pistol training (and shooting training, in general) products ever developed, in terms of training hardware designed specifically to enhance and improve the shooter’s “software”, i.e. his/here shooting skill set. That might sound like hyberbole, considering that there are so many training products that have already been developed, but we’re serious. We think this new product could be just that important, provided it lives up to all the hype, and is reliable and durable under hard use......."
http://www.defensereview.com/sirt-tr...ger-mechanics/