9mmdude,
I own a SP101 and love the firearm but do not carry it in an ankle holster. I do not carry any of my firearms in an ankle holster. I think it makes them too difficult to get at in an "emergency" situation. Of course, that's only my opinion.
BTW, out of all my handguns, my SP101 is still my favorite carry gun. I absolutely love the .357 mag. but that's another thread all together.