I got it because I was running my first 5.5 game, after a couple years hiatus from DMing, and wanted something I knew would be balanced for 5.5. Bonus points that it came out like three weeks before our session 1 for that group, so I knew nobody was going to have already played it.
I only ran the first adventure. It was fine. WotC published campaigns are generally more trouble than they're worth once someone has some experience under their belt (just too many poorly indexed and poorly laid out details to keep track of), but the anthology books usually have something for most people's tastes and the style is less difficult to navigate in a short adventure.
I'd recommend a newbie DM start with Lost Mine of Phandelver if the group hasn't played it already. Even with needing to update stats to 5.5, I feel like its still the 5e adventure written most with the idea that the DM is probably a first-timer in mind. If you also have the essentials kit its very easy to borrow locations and encounters from that and learn to make a campaign your own.