giving this a 3 star even tho i was denied, but allow me to explain this before i am demonized =]
i did the offer through this site and was *instantly* denied with a CK score of 697 and a TU 699 with one single account (also a capitol one the small No Hassle card) which has a $0 balance. actually not only does it have a zero balance but in the months i have had it since august '11 i have used it every month, and payed ahead twice a month. In fact i never showed a balance on my account because of this habit.
anyways, as soon as i could hit the apply button i was denied. i chalked it up to somehting to do with my credit rebuild or to my now short credit history as this single card was ALL i have left in my credit history now on all 3 beureas. to my amazement when i got the letter it said i was denied for having bad/ past due accounts or somehting of that phrasing. i spent 45 mintues on the phone today between 5-6 different people at capitol one who were all rather confused until i got to the last 2. a nice lady in accounts did a check on me and my very first credit card was also a capitol one card (which i had forgotten and thought was a sears card) which had been sent to the grouping of overdue, shut down, or forced closings for payment problems but showed to have been payed in full and cleared back in '03. she got me on the phone to the last guy who had to make 3 other calls about the situation before he found my answer.
turns out that because of that old account that no longer even showed on my history (tho it had been flagged in their system) would show for a stated amount of time he could not directly say, but did mention it would likely be cleared up in a matter of months. but until that time any attempts made by me above a bottom tier card would hit an automatic denial, but that it was an internal system check which means that even tho i was denied for this, it stoppedthe application before the secured server even ran my credit... thus no hard inquiry by capitol one (which i had been watching for and wondered why it had not showed up yet on my monitoring site i also use).
so in closing while i tried to stay with the company that had once again started me up in the credit worl., i am still very happy with them having taken the time to investigate this oddity, and will likely check back with them in a year or so if i need another card as i still have yet to have a truly negative experience with them and i encourage EVERYONE who is denied by any company to call and try to figure out their reasoning for a denial that seems unjust - either you can get them to reevaluate your application, or you can learn something that may well prove very important to your knowledge and understanding of all this credit babble anyway.
hopefully this helps at least a few of you,
PS~ now knowing that my credit has not been affected at all by this, i shall go do some research between Chase's equivalent card on here as well as Amex and Discovery who happened to pre approve me in the mail today. Knowledge = Power =]