I have very few complaints about these sites - the sites themselves are actually quite nice compared to most.
I was more impressed before I saw the inventory pages though - they're a bit plain and scattered. They collapse nicely to mobile, but on my desktop they seem to be a bit taped together. The VLP listings are especially barren - it just seems to be lines of text stacked on top of each other (King's Auto specifically).
There were a few responsive issues on my phone with the forms - inputs scattered all over, forms that are way too long for me to ever consider filling out on a phone, the service page didn't load properly the first time, etc. My issue would not be with the responsiveness of the site in this case, but rather with the fact that I still think there's a better mobile experience than this and you're sacrificing that opportunity for the sake of convenience (IMHO). If you were to offer a full-blown CMS that allowed your customers to maintain content on all parts of the website, can you still offer a good responsive layout? What if your client wants to make their own Recommended Service menu and they don't add "l-column--medium-3" to the columns - what will happen to this page when it collapses?
Responsive is easy when you have a set number of pages and you have a web designer managing your content for you.
Many of the members on these forums are not web designers and still want to maintain all the content on their sites.
Either way, good job on the sites - they're certainly better than most of the options out there for clients who don't require a higher level of control over their own sites.
