I have been following the research on cold-level laser therapy for awhile. During a short stint working at a PT office I heavily utilized one on myself and clients. I haven't invested in a device simply because the cost is prohibitive.
During a recent manual therapy workshop (with the amazing Curtis Turchin DC www.gentlemobilization.com) I was introduced to the LZR Ultrabright (Red and Infrared) LED and the increasingly large amount of positive research coming out in scientific journals (see above). In fact, there are so many articles with such clear results that I decided I can't NOT have my own device any more. Thankfully, these devices are considerably less expensive and mine arrives on Monday! :-)