Edit: After seeing this review, the owner called and apologized for how things turned out, and offered to refund what we paid. The gist of what he told me was that they make sure their work is up to code, they pull permits when they need to, and so forth, and that he thinks that was why their quote was higher than the other two plumbers. I will also add that each plumbing job is different, and ours is pretty unique, and that we may have communicated something differently about what we needed done (we had about 5 different tasks for them to do, one of them being a bit atypical). I don't believe they were trying to inflate the price, and the owner reiterated that they are very careful and fair about their pricing (and said something about being routinely audited to ensure this is the case).
I would also like to add that the people that we interacted with (David, the plumber who came out to assess the work to be done, and the woman who answers the phone; sorry I can't remember her name!) were both very friendly, and that the only thing we didn't like was the quoted price. Well, also, we were trying to move forward quickly, and it took them a couple of days to get back to us, but that is pretty minor, and I am certain that they are quite busy (plus we did have the one unique request that they had to check on). The quote fee is now being refunded, and I think that suggests that the owner is willing to do what it takes to make things right with the customer. So a few things to keep in mind: 1) they have a lot of really great reviews, 2) our situation was unique, 3) I can only assume they do great work, as other Yelpers say, and 4) they made things right with me (and they will presumably do the same for you). I'm leaving the original review below, but I'm changing the review to 4 stars.
Original review:
We had to do some remodeling in our kitchen, and needed a plumber to re-run pipes to our sink and dishwasher, and install our faucet and garbage disposal, etc. We called one plumber (with top notch Yelp reviews), and they came out and gave us a (free) quote, but they wouldn't return our calls when we tried to set up an appointment. Then we called A A Twin Brothers, based on the very positive reviews here on Yelp, and figured we would pay the $80 fee they charge to give us a quote since it goes toward the work they will do, and we really were not interested in shopping around. But when the quote they gave us was literally double the price we were quoted by the first plumber (that's not an exaggeration), we decided to get a third opinion. The third plumber (also highly rated on Yelp) did not charge any fee for the quote, and their price was almost identical to the first plumber we called. So we decided to eat the $80 fee, since it would have cost us *much* more than an additional $80 to go with A A Twin Brothers. I would have felt bad about reviewing a plumber whose services we did not choose to employ, but since we paid them for a quote ... I don't feel too bad about reviewing them on the price they quoted us. It felt like they wasted our time and charged us for it. I can understand a plumber not wanting to deal with people who shop around for the lowest price, and that was exactly why I did not have a problem paying for the quote, because I wasn't trying to shop around. So while they may very well offer good prices to some people, as the many positive reviews here suggest, I just wanted to offer my experience, and say that you might want to think twice before paying a plumber $80 for a quote. There are plenty of highly rated plumbers who will not charge you, and they may well give you a better price.
[end of original review]