I would not use this on a tight deadline.
He has been a good client and I am disappointed in this review. He reported an issue with a 3rd party product called IE Tester. This product is supposed to emulate different versions of Internet Explorer. We tested his issues on actual different versions of Internet Explorer and couldn't replicate the problem and I told him that IE Tester has a bug.
His response was: "I hunted down an older machine and the error didn't show in that browser. I guess it is an issue with IE Tester."
This review was based on a bug in a 3rd party product and not on an issue with our software.