I also purchased a Chacago tool Item from Harbor: a 7 amp recipricating saw. It has functioned as expected but after less than 2 hours of use the blade chuck (NOT keyless) has lost its keeper pin (worn away from the chuck not being able to stay tight on the blade). I am now looking to replace this part and maybe go keyless. I will pass along my findings. Oh, the price was $79.
I also tried the blades that came with the saw and foung them made out of mild steel: the teeth disappeared at the first couple strokes.