AG Cleans well, just very little suds, Rinses easily and gives a good finish.
Off on the tangent thrown above AG SRP and EGP is much better than the Megs Gold Glass Wax or there 3 stage system.
Shampoo's wise I much prefer,
CG Wash'n'Wax
Sonax Gloss Shampoo
Duragloss Wash
or Swissvax Car Bath.
If you want some good value ones in Bulk at good value for money
Meguiars Shampoo Plus
Meguiars Hyper Wash
Which are both 15-18 Quid for a US Gallon (About 3 litres)