I like my eibach pro system plus, but this is the first car that I have done suspension work on, so I can't compare to other manufacturer's struts, shocks and sway bars. If you want to maintain comfortable ride quality, just do the eibach pro springs. I drove with just the springs for a year or so and the ride quality was great. If you go with the full package, you will notice a big difference if you drive on bumpy roads. Just the springs with the stock shocks and struts was a mild difference but upgrade everything then it is night and day difference.
2014 Mustang GT 6R80, Procharger Stage 2 D1SC, BBK 85mm TB, Boss IM, Sai Li fuel system. Circle D 3C, 1-7/8" Kooks Long Tubes w/Offroad X Pipe, Lethal Over-Axle Pipes, Corsa Quad Axle-Back, Eibach Pro System Plus, BMR K member, Shaftmasters DS, Forgestar CF-5 Wheels and Nitto NT05 tires. Lund Tuned
Lots of suspension goodies and some other stuff I can't remember.