I haven't, but am considering it in the future
I've been very impressed with Impactguns prices, but have yet to purchase anything from them. I considered purchasing a M6 light from them, but might just purchase it locally for $289 or so instead of their $268. But thinking about it now.. it would be better if I factor in taxes.
What are you considering purchasing, if you don't mind?
Also, What part of Ohio are you from? If your near the Cincinnati area, or Loveland/Mason/Goshen area, I would recommend Shooters' Supply Shop as a quite reasonable place of business.
Cyanide_357