I also tried the vanilla. I am not a big coffee drinker. Like Sue, mine is mostly sugar and creamer, so I really didn't care too much for them. I think it still had a strong coffee taste.
I had a box in my cupboard for about 2 months. I tried them with tea , so i bought some single serve coffee, thinking they would taste better in coffee. I find them very sweet. I will stick with plain Splenda.