Late to the party on this, but I've been using the 30Gx 1/2" for months now and love it. If you're going to be pushing any sort of volume thought the syringe (upwards of 1/2-cc or more), especially if you're doing them subcutaneously, I would recommend looking for 1" long pins. Otherwise, you'll end up with a lump at the injection site. It will eventually absorb, but it's just annoying to look at, in the mean time.