As an electrical engineer I can really appreciate this light and find this light to be one of the best quality lights for the cost available on the market today. The functionality AA set-up and the tactical over standard is a no brainer from a consumer standpoint. The set-up is so simple I'm pretty sure my 6 yr old niece could reset the favorite settings. As with many lights on the market, size seems to be a big issue for when it comes to choosing the correct one. The Quark AA2 is about the size of a 2-AA maglite, allowing it to be stashed just about anywhere comfortably. I actually ordered the AA2 with the Cree XP-G-R5, must have been a mess up on shipping (A+ shipping - ordered on a Friday and received it on a Monday) but it's not that big of a deal, most likely purchase both and shelf one they are that nice. Overall I would give this light a 9.5 and that .5 off is basically for color rendition of it.
Pros: Very bright and versatile, Value purchase, Quality made
Cons: Color temperature is slightly green
This review was written in the old system and had content requirements that are different than reviews written today.