I'm quite disappointed at how short the actual story was - they actually had to follow it with two previews, one of which I didn't even bother finishing because I really hated the art (and I've just clicked now that they're not imitating the 70s style, that specific comic is actually from the 70s. Still not interested) 
 However, I did enjoy Shattered Empire itself, especially the part on (view spoiler)[Naboo!! (hide spoiler)] I liked both the new characters and the way the old ones were included. But as I said, I wish we'd had more. 
 The artwork was nice overall, I liked the character designs, especially how they drew Leia (one or two questionable panels aside) - too bad she's not as well drawn in the Princess Leia preview, even though I got used to it after a few pages (not sure if I'll pick it up though). 
 It's a nice "bonus" to both The Force Awakens and the rest of the Star Wars movie, so I'd recommend it if you're a big fan (and because Shara Bey is awesome), but other than that it's not a must-read.