The quality of the chemicals is always spot on. Never had a bad batch from them, ever. The only problem is transportation. Since they stopped working together with UPS evrything went downwards... Usually it takes 4-5 days (or even longer), where you used to be able to order something on a monday, and receive your parcel the day after. I hope that this will change again for the best. Untill then, I can only give them 3 stars... I'm sorry, but there are so much vendors who deliver 2-3 times faster. We are not living in the middle ages, things can be shipped fast these days. Come on chemical planet, you guys used to be the goat!!