They taste as good as the more expensive stuff I have tried.
Starbucks has some instant as a concentrate in small skinny ketchup type packets. I haven't tried any because it too expensive.
But why fool around with instant anyway? It takes as long to boil the water for a cup of instant than it does to make a cup in a drip coffee maker. They even have little 4 cup drip brewers at Walmart for less than $9. You need to get a reusable basket so you don't have to use paper filters.