For whatever it's worth . . .
I tried switching to Humalog a few months back. The first vial was absolutely inert, for me anyway. Might just as well have been a placebo, or plain water. So I got a second vial and made sure it was from a different lot. Same result. So I gave up on Humalog.
I now use Apidra and it works beautifully -- does exactly what I want it to do.
A textbook example of YDMV (Your Diabetes May Vary).