With so many great products out there it really is hard to say which is the "best". The list of all the products in my ever expanding detailing arsenal reads like the Sunday Newspaper! Infact, a day of detailing for me starts with a rather extended "decision making session" because I love just about all the products I use. Some days I use a "system like" approach & some days I use a "combo like" approach. For instance, if I'm in a "Zaino mood" I use strictly Zaino products. When I'm in a "combo mood" I might use Chemical Guy's Shampoo,Optimum Polish,Klasse AIO,Clearkote VM or RMG,Souveran or Natty's Blue then QD with FK1 #425. ( you get the picture.) For a "quickie" session, I might wash with QEW then QD with Crystal Mist,QuickShine,Spray & Gloss,Z6,Z8 or FK #425. My "extended quickie" sessions lately have been a good wash,QD w/#425,a layer of FX-100 then a follow up QD with #425. So many products......So little time!!! Have fun,experiment & enjoy the process!!