Unfortunately the reviews at GMaps are becoming less and less reliable though, as many businesses begin to have bad reviews removed through lawyers.

I've had it happen to a couple of mine, where Google forwarded the request of a law firm to prove I had actually been at a restaurant more than 5 years ago (where I reviewed it with 3*).

Even if you can prove it, most people won't and in that case the restaurant went from 3.8 stars to 4.6, which is a shame really. It confirms a hunch that just as with Amazon the reviews get a lot less reliable.