Capital One has been my credit card provider for several years now. They have increased my credit limit a few times without me ever having to request it. Each time, they increased it by $1,000. I started out with a $750 credit limit and my current credit limit is $3,750.
I also recently upgraded to their Quicksilver rewards card, so I am earning 1.5% cash back on EVERY transaction. I had received the offer to apply for this upgrade several times via email, but I didn't take advantage of it until they actually sent me an offer to upgrade without even applying -- so I didn't have to enter/update any of my info such as my income, didn't have to have my credit pinged, or anything like that. Kept my same account, card number, due date, interest rate, etc. I was really pleased.
I think I've only dealt with Capital One customer service once, when there was an unauthorized transaction with my card (although I had not lost it) and I requested a new one. To my memory, the phone call was very quick, easy, and smooth. Got my new card with no issues, and I was not charged for the unauthorized transaction.
I have never had to carry a balance; my card has been paid off in full on time every month. Therefore, the high interest rate has not affected me. My interest rate is 22-point something, not quite at the very top of the high end of the interest rate scale but pretty high up there. I have not tried requesting a lowering of the interest rate, but I plan to. It would be nice to know that if I ever do have to actually use it as a CREDIT card and carry a balance if I find myself facing some sort of emergency, that I wouldn't have a monstrous amount of interest to pay. The interest rate is the only reason I didn't give a full 5 stars.
I initially got approved for my card with them back when I had no credit history and other cards would not approve me due to my lack of a credit record. I can understand a high interest rate in that situation, but since I've been with them for several years and paying reliably, I think a lower interest rate is in order.
I saw another review from someone whose Capital One card apparently got canceled because the card was always being paid off on time and Capital One wasn't making any money off him. If that's true, thank God that hasn't happened to me and I hope it doesn't. That's really concerning if true.