I think of Eno as the gateway hammock. They're pretty commonly available and are the introductory hammock that a lot of folks get after trying the old cotton rope woven bridge style backyard hammocks. The Eno double is just fine...many people have them and use them and are perfectly content with them. There are plenty of other hammocks to choose from as well, with different styles and lengths, and configurations. The way you lie in a hammock and what's comfortable for you is one of those things that you need to experience.
One of the big factors affecting comfort for most folks is the overall length of the hammock. The Eno is a relatively short hammock @~9.25 feet. A lot of folks suggest getting a longer hammock (10 or 11 feet, depending on your height and the way you sleep) in order to get a more flat lie.
if you happen to live near where a group hang is taking place, stop by to check out other folks gear to try before you buy. If you happen to buy something and it turns out not to be ideal, you'll probably be able to sell it here for close to what you paid for it.
One of the common sayings here is "hang your own hang"...lif it works for you, go with it!