There was a customer who had a bad experience a few years back and posted negative reviews all over the internet so if you search CG and customer service, that's what comes up first. I don't think that it's representative. I have ordered from them several times with no problems and the quality of all items was excellent. Their prices are very good. They aren't the fastest but they state up front on their web site what their fulfillment turnaround time is so there are no surprises.
Once I didn't get a shipping notification. I don't think it was their fault but it was UPS. When I contacted them, they tracked down the notification. I got an email a few days later that followed up to make sure my package had arrived.
I have ordered mostly EOs, butters, some colorants, citric acid, and a few FOs.
They also have a customer loyalty program that saves you a little towards future purchases; around 5%