These guys set the standard for buying cards online.
They have nuanced over-standard operation and delivery systems. Each card comes in a plastic sleeve with their logo sticker, a reflective tag similar to the authenticating decals on CCs, and their sticker with bar code and titling (I assume) for their cataloging and inventory control. The cards are shipped in a hardboard envelope like those used from shipping discs.
I had one problem ordering where each card I tried was reporting unavailable. Upon contacting their CS rep, he reviewed and corrected the listings, while staying on the phone with me to refresh and retry the order and receive the confirmation email. Most places, at best. would tell me to retry in an hour.
Two times where the card was $0 balanced on first use. They asked for the card number so they could check. The next day I received an email that my credit card would be credited, which posted the next day.
I'm surprised that the above reviewer, were having the problems they experienced (not to invalidate their review), While I've had nothing but great experiences over the past 3+ years.
GCZ got bought out by RetailMeNow, but I hadn't noted any changes. But then again, I've not had to call support since that transaction. I hope that that was a fluke incident and not the start of a culture change there.