Paid a base fee plus per sample cost: 3 samples per item tested, for 6 in total samples on two different surfaces. Professional, timely, and quick answers. Very thorough explanation. I would use them again.

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Company Response

Dear Dario,
Thank you so very much for taking the time to leave this thoughtful and kind review. I'm so happy we were able to assist.
With sincere thanks, Angelina, Vince, Liz & THA Team!