Just be aware that you lose Section 75 protection on purchases via Curve, as the way it technically works is charging your credit card to create “electronic money” which is equivalent to the price of the purchase, and then funding the purchase via the “electronic money”.
This means that it is not a three-party relationship (you, the credit card company, and supplier of the goods) but a four-party relationship (all of those plus Curve as an intermediary). The way the legislation is drafted, this means that you are not covered.
It’s just something to be aware of if you are planning to make a large purchase, as you may wish to use your credit card directly in this situation (Curve would be fine for everything else).