Marketed as the taste that made lemon lime famous, Howdy is considered to be the forerunner of 7Up. Charles Grigg was the original inventor of the Howdy formula, forming a company in 1920, that made Howdy and eventually Orange Crush. Eventually, Grigg sold the rights to Orange Crush, and began to concentrate on just lemon lime sodas. He came up with a recipe based on Howdy. He called it "Bib-Label Lithiated Lemon-Lime Sodas", which eventually was shortened to 7Up.
Now, a confession: I love 7Up. So this is a biased opinion. Great fresh smell when opened, bright light, citrus. I was expecting more of a 7up flavow. This tasted a lot like 7Up with some orange flavor added. Not a bad thing, just not what I expected from the soda that's supposed to be the precursor of 7up. I'd drink again, likely buy again as well.
Side note: be careful around honey bees with Howdy. They love it. Couldn't drink the last little bit of the bottle because 2 honey bees had found there way into the bottle.