Hi Simi- Eraser is a really, really good product! It is just like a regular concealer basically, but they formulate it really nicely so that is does a good job covering up redness, blemishes, dark circles, etc. I have Eraser in both the powder version and the other (pressed?) version and I like them both, but I think I prefer the powder version just a little bit more. I am glad that you got a good match in Pure Luxe. Their foundation does not seem to get much discussion here, but I think it is pretty good and I found my match in it immediately. I would definitely say that you should order a sample or Eraser, or maybe just go right for a full size- it is that good.
Oh, and their eyeshadows are beautiful too- I have about 20 of them and like them all.