Well, I decided I'd get a PSK to supplement my other gear. Ultimately it's cheaper to get the kit than to buy the items. Plus, if you purchase the item at Amazon.com and "subcribe" to it you get an additional few bucks off; you determine how often they send you one. So I set it up to have them send me one every six months. End result is the PSK ends up costing $22 with free shipping! You can't miss with a deal like that.