SO, sorry to bump this up but I remembered some people had used it. Bought this, have been using it fairly consistently for about 5 days now, no problems. Yesterday morning it was a weeny bit stingy when I put it on, but fine in the evening. Then this morning I put it on, stingy again, but also brought up the bottom of my eye bag (sexy) quite red. And I thought "weird, but it'll go away". Only...it's been 10 hours and there's still just a red mark in the same shape. It's not warm, it doesn't sting, it doesn't look swollen, it's just a red mark.
Really weird as well - I think there's a definite improvement in my eyelids already, but really hoping this is just a one off reaction so I can keep using the stuff!