It was working great for me for quite a few months then around December of last year I noticed that absorption onset drifted from 15 minutes to now around the 1.5h mark. Not just that but some doses simply don't seem to absorb if you're just sitting down, then tank your blood sugars when you stand up and move around a bit. It's so disappointing, I'm trying longer needles to see if that restores some of the fast absorption that I used to enjoy otherwise I might just switch back to Apidra.