I have used so many that it sometimes sways my opinion on a monthly basis.
Most consistent performer: CarLack 68 Shampoo. Amazing at everything.
Most lubricating: AF Lather or BTBM.
Best cleaning: Megs Nxt but removes protection.
Best maintenance: Dodo Juice Sour Power.
I don't like supernatural, it is way too inconsistent even when following strict dilution ratios. 3M is a good performer and cleans really well but doesn't add anything but that's not bad thing really...maybe too watery. Ziano Z7 is quite good and so is glassworks. Agreed with Nige on magnifoam !