My hair looks great product free for about half the day; unfortunately, after that point, it begins to de-clump and degenerate into awful frizz. But everyone has different hair.
If your hair is already softer from cutting sulfates, it's a bit difficult to tell though. There are many different types of frizz, caused by a variety of things, including humidity, over-conditioning, dryness, curl separation, static, etc.
For some people, the "frizz" (in a lot of case, it's just unclumped, undefined curls) disappears with CG though. Oh yes, and keep in mind that even the technique you use in the shower can affect your results, not just the products you leave on afterward. For example, I get more definition in the back if I scrunch upside down.
Hair Type: 3c, Med-High Density, Low Porosity
CG since '09
Low Poo: KC Come Clean
Condish: AOHR, TN (Avocado), TJ Balancing Moisture
Leave in: GDL, KBB
Curl Lotion/Gel: CHS/CK
Others: CJ Curl Rehab, Jojoba Oil