The guys are amazing, they provide essential plugins and the support is absolutely amazing.
I've been a client since... 2011 or 2012, and it's no surprise several of their team members are still in the place, you can tell that it's a nice place to work in.
Plus, their CEO James Famer is also very good at understanding some mistakes he made and to adapt, he takes the time necessary to explain why the company does this or that, why it succeded, why it failed, and it's really helpful when you're a freelancer as I am to know better what you can expect from them for the future.
In a word, you can trust them: of course they do mistakes sometimes (but only scammers never do, and they are anything but scammers), but you can totally trust them and build long-time projects on them and with them.
By the way, I didn't receive any incentive to write that review. Review collected by and hosted on G2.com.