Instant is alright, but I am not a fancy coffee expert- I use a Keurig with pods. I like the flavored instant coffee powder- the ones that are pumpkin spice or hazelnut. You can usually get them to froth up when you whisk them which is fun, though they are insanely high in sugar.
I don't really think it's worth it to get the unflavored ones, but once again talking from a person who has a coffee pod machine. If you don't have a machine and you still want coffee, might as well try instant. I think if you prefer black or unflavored coffee, probably still better to go with a regular machine because that'll give you a better taste. If you are going to mask it with creamer/sugar/etc then I don't see why not go with instant.