I was fortunate enough to see her in two shows. She was wonderful in both. In Darling of the Day, her combination of warmth, humor, and a fine voice made you love her after she had been on the stage for five minutes. I actually saw the show on opening night because I was home from school for the weekend, it opened on Saturday, and there were seats available. There were in fact some empty seats. She brought down the house with her big production number, Not on Your Nelly, and had several wonderful solos. Her Tony award was truly deserved.
She was also great in 1600 Pennsylvania Avenue, but the show was a disaster that ran a week, I think. Still, the music and lyrics contained some gems. In one -- I can't remember the title, she again stopped the show (actually woke up the audience) singing a duet with herself, playing two first ladies. The other great moment in an awful show was a solo titled something like Take Care of this House.
I always found it frustrating that she never appeared in NYC again, because she was that good. I guess she tired of appearing in mega-flops. Darling of the Day was a wonderful show that received many excellent reviews, but it never had a chance. No advance, no names, opened in late January, out of the way theatre (on 54th St., close to 6th Avenue, and the to critics for the Times at the time were both negative. Ironically, Walter Kerr, who was very tough, loved it.