I have used Simply Business Class now to fly from Europe to US East Coast, US West Coast, Central
America and South America.
Service is expeditious and an initial request is quickly followed up with a range of options. From Europe these have always included first tier carriers such as Lufthansa, Swiss and KLM. Always very attractively priced.
Staff are very competent and knowledgeable and a booking has always been made with a minimum of effort.
I have no hesitation in recommending them.