Question:
I've tried the Gariner peel kit and I gave it the thumbs down. The product was a waste of money. I prefer Proactiv over the peel kit as it actually takes effect as soon as you use the product.

Answer:
I found consistency to be the key, there was a small improvement at 1-2 weeks but at about the 3-4 week mark things really cleared up and stayed like that.
The L'Oreal Gel mentions 28 days to determine effectiveness.
It won't suit everyone but I think following the Paula Begoun plan is the best treatment before seeking medical advice and these products fit the bill, as does Proactiv.
I am not familiar with the Clinique ingredients but I imagine it has some BHA or AHA too.