I use GF Curl and Shine leave-in conditioner and gel with it. I never get the crunchies when I use those together. The SCC is more of a finishing product for me that helps tame frizz and define a little better after my hair is dry. I love the SCC, but it seems to be (for me anyway) one of those products that works its best when used with other products.
The time that I tried the GF SCC (not realizing the dimethicone in it), I topped it with HE SMU gel and it was a really good combo. My hair lasted me a good 3 days without having to start over. It was a great combo, I must say!