I've been kind of tempted to try the ITP A3 as well. However, I was talking about a AA light.
Love this light! Just got a xeno Eo3 for a gift and I would probably recommend that if strictly running AA. However the I think I actually like the Trustfire R5-A3 better for use with 14500s. I think it has better heat management. The XM-L in the xeno is brighter. Incredible on a AA. However, I'll take the extra money and put it towards other XM-L lights in the 18650 formats for more light. This thing gives out way more than anything else I've ever used and it isn't all that much dimmer than the xeno given it was only 1/2 the price.