Great in principle, appalling in reality
Let me put this bluntly... Curve is an absolute farce. 1 star is quite a stretch.
Plus points:
1. The free "blue" card arrived quickly... just 3 days.
That's it. Now, moving on to the bad points...
1. They advertise AMEX support, but AMEX have refused to trade with Curve. Despite this, Curve continue (even as I type this message) to mislead customers by advertising AMEX support.
2. They aren't PCI compliant, so shouldn't be processing card data at all. That alone should be sufficient to make you run for the hills, but I'll carry on. This may give some insight as to why AMEX has refused to do business with them.
3. The "verification number" SMS never arrives. I contacted support to (eventually) be told that I had entered the number incorrectly, so the system wouldn't send a text and she couldn't call me. The number was correct; it's worked for years... but to humour them, I re-entered exactly the same details again. It sends, but never arrives... making the card literally useless.
4. Customer service is virtually non-existent.
They advertise "24/7 phone support" for card cancellations, which is nonsense. When you call, an (albeit friendly) lady answers telling you they're closed and she'll take a message to "pass on for Monday morning". When I queried if the card would be cancelled immediately, she said "I can't promise anything, Eddie's going to voicemail right now". I've no idea who Eddie is, or why he's integral to a process which should be fairly seamless and automated.
However, upon further investigation, their "24/7 support" line is simply a virtual office/messaging service. They literally have no access to Curve systems whatsoever, thus are powerless to do anything other than relay messages to whomever is "on call" that night. If he/she doesn't answer (as in my case), you'll be waiting until the next working day, at least.
Thankfully, a verified Twitter account allows me to attract a fair bit of media attention quickly... and a few hours later, the CEO & CTO are followers. I messaged them both immediately... neither responded.
In principle, Curve is a great idea. Unfortunately, it appears to be run by a team who simply cannot cope. Waiting a week to cancel a card being used fraudulently is beyond a joke... likewise blaming customers for your own failings as a company.
Do not trust this company with your cards; it's not safe.
[Edit]
As I submitted this review, "Eddie" rang back. He confirmed the 24/7 number is an external company, not the "dedicated Curve line" they promise but said the company isn't in a position to change it (presumably lack of finances, but he didn't say nor suggest that). My account is being cancelled now and he'll following up with an email to confirm.