Yes we use it and once you receive 6 or more reviews, your review stars show up in search boxes and review snippets show up in your search box. This gives you marketing advantage if you're in a market where competitors ignore Google+ or have only one or two reviews.
We leverage our promotions to gain a lot of good reviews. Participants trying to win a free tablet or other gift will leave glowing reviews for your business if asked.
With the world of social media having so much power over a business you should have an active promotion constantly building your audience and feedback to spearhead the occasional dickhead review that you'll get after you've done all you can for the idiot. Your best defense is a good offense. It still cuts us to the core when we get a negative review but doesn't do near the damage when it's along side 200 positive reviews.
We used to just ignore social media altogether. Nobody got time for that is what I used to say. Well we had one bad apple just go down the line and hammered us on every platform. Angie list, yelp, yahoo local, facebook, ROR, BBB and more. That was the light bulb moment for me as this one joker cost us a ton of business because if anyone searched for our business reputation his was the only one they saw. After 26 years in the business and really just one joker smashed us?
That is when I got on the offense side of the business and firstly built all my citations with relevant information, kws, graphics (with kws) and lined all the ducks up so we had a solid local SEO platform.
Next I started with promotions and learned how to get them traction. We started with just 90 likes on our FB page last September with 2 reviews and now have just about 7000 with 200 reviews. Now that I have the audience I can build reviews on any platform I wish. I can ask my audience to promote any specials or discounts and in a day net a reach of about 7000 people and stir up business. The occasional negative review now doesn't sting as it did last year.
If you're ignoring social media, I think you're leaving a lot of meat on the bones.