It's not good for spending whilst travelling though - the exchange rate is inferior to Mastercard and Visa and they charge a 3% fee as well, whereas there is no fee and a better exchange rate on something like a Clarity.
Mine was very useful for one specific purpose - I took it out when there was a 20k MR bonus for a certain level of spend, booked as much of my US/Canada trip on it as I could to trigger the bonus (though this did end up paying more for several things inc 30 quid extra at Virgin!!!) and then redeemed all the points for 3 nights at a Sheraton in Vancouver which would otherwise have cost me £300.
I also used the lounge pass as well at YVR but to be honest this was 'nice' but I don't really see the fuss with airport lounges. It was fun for a 'yea, I'm in the loungue' kinda experience but it wouldnt have materially affected my journey had I not been able to use it.
But since then I've had numerous occasions now where I've tried to use it and have always had to fall back. On two occasions I've spent a tidy sum on tyres for cars only to have it rejected. Service at a main dealer, sorry no Amex. Infact pretty much everywhere that isn't a high street chain either says no or loads the card up with a fee that makes it not worth the bother.
Tempted to cancel it. There must be some circumstances where it's worthwhile, but not sure it's for me. Which is a shame as I'd love to use it as my normal go-to card because some of the things they do, they do very well. Book travel on it, ie flights or car hire, and your paper statement shows the rental agreement number, pickup date, flight numbres, etc. Cool.