Why I Love FlixBus
Cost, free 1st bag boot storage, overhead storage for personal carry-on (which is all I have), comfortable seats that recline (and shift sideways giving you separation from neighbor) foot rests, fold down table w/cup holder, foldaway armrest, Seat pouch, seat belt, free WiFi, power plug (yes an adapter is needed if using standard Edison), but note most have a USB plug. Overhead light & AC vent for every chair, window curtain, real time GPS map, sometimes movies, digital clock, small but very useful toilet.
Cost, mobile app w/easy online booking, guaranteed seat & QE code ticketing. There are even some routes that have food options. English speaking team members, clean, efficient & generally on time, with stops conveniently located near/in the City Centers. Did I mention Cost?