No personal experience, but a browse around their website reveals that they're a UK-based entity in business since late 2014, specializing in mystery and crime fiction. About 70 titles listed on the website, a fair number of which are by its Founder and Publishing Director. Last year they launched the imprint Bombshell Books, which handles women's fiction, chick lit and romance (although it appears they have yet to publish under that imprint).
Usual small-publisher language in their "about us" section stating they aren't a vanity press. Primarily an ebook publisher although they also offer POD and pay "industry-leading royalties," whatever that means.
Their two editors seem to be the only staff members with a publishing background. Their cover designs range from not-so-good to decent. Most of their ebooks on Amazon retail for about $2.99; sales rankings seem to be in the low to middling range.