An order placed in 3/10 went unfulfilled without any notification from Science Lab.com. After numerous phone calls starting 6 weeks later, I learned they were out the the products and had no idea when they might arrive, if ever. Why was I not informed by them? I asked for a refund now that 3 months passed and they said only credit; problem is I did not want anything else from them. Got nowhere for another 2 months and finally insisted to speak with a supervisor, which was a chore. She promised a refund within a day but lied. Instead, I revceived an order of the items 10 months after placing it. How useless was that, plus 2 of the products were damaged? I will never do business with them again, nor do I recommend anyone to them. There are better sources. Their customer service is a failure.