Yeah, I agree with being able to change batteries. I have a couple packs of the little Capstone bulbs that use rechargeable AAA's that I got somewhere, probably Costco, for cheap. Use them daily for low lighting at night. These olights are basically the same thing w/o being able to change batteries. To be fair they are likely higher quality but 1 for $20 vs 6 for $20.... for now I'll chose these:
And yes, I would really like to have olights! If they drop to $5 each I'll grab a bunch.
While I would really like to have some I just don't think they are worth it, net even on-sale and especially not without being able to change batteries. I think I will buy one of their PL mini Valkyrie 2's though. About the only thing I can find that will fit an XDS 3.3