Chase was my first credit issuer and I have found them to be the best of the cards I currently have. It is extremely easy to apply points, combine points between cards, pay, navigate their app and website etc. I've lost my card twice while in a foreign country and it took seconds to cancel my card through my phone and have a new one sent to my home within a few days. Their customer service has been quick and I really love them. CFU is probably the card I should go with but I did want to branch outside the chase family (I already have 3) as I have heard horror stories of people getting their entire account shut down (I don't want all my eggs in one basket sort of thing). Edit: listed more pros to chase
I have this card and have zero issues with using it. It works for me like a well oiled machine. I would get it again in a heartbeat.