Window Cleaner (incl wipes) - A+
Lint Free Paper Towels (for Window Cleaning) - A++
Speed Shine - B (prefer Final Inspection)
Clay - A (works good, but haven't used other clay)
Boars Hair Wash Brush - B+ (a bit too big for my car)
Under Carriage Spray - A (clever product)
100% Cotton Towels - A (love them)
MF Wax and Polish Towels - C (didn't like the sharp edges/binding)
Rubber Cleaner - A+
Wash Bucket - A+ (but expensive)
Rubber and Vinyl Dressing - B+ (not bad, but prefer Lexol and 3M)
Leather Scent - A+
Leather Conditioner - A++
Plastic Polish - A
Plastic Cleaner - A
Brushes 10224 - C (too big, hair falls out too easily)
Large Foam Swabs - A+
Three Finger Sponge - A++++ (nothing better for cleaning the inside of my alloys)
Metal Polish Cloths - A+
Double ended swabs - A++ (these are great for dressing rubber trim on car)
Window Cleaner Set 90247 - B- (MF bonnet leaves lint)
Micro Fiber Gloves - A+
Tire Brush - A (expensive..like a lot of products, can be bought else where)
Blue Detailing Sponges - A
Four Detail Brushes 15507 - A
Engine Gloss Spray - A-
Plastic Coated Impact Socket Set - A+
...anything thats an A+ or better is worth buying for sure.
A lot of people say you can buy the Griots stuff cheaper else where, but I have only found that to be true for a small number of items. Many items I am yet to see anywhere.