A friend of mine was undecided againt the Bowtech Assasin or the Matthews Helium. He shot both and settled for the Helium. I believe the fact that he Robin Hooded an arrow during the test shooting may have had something to do with his decision. He told me that they ran it through the chronograph at the archery shop and using a 380 gr arrow, 28.5" draw, 67 lb weight, he got an average of 296 fps. That's fast.
My Martin Firecat @ 64#, 28" with a 422 gr arrow shoots 262 fps.