Around here, Deva is a love/hate line. Many of us start out with it, think we like it and then move on to other things that we like A LOT more.
The best way to choose ingredients/products is by hair properties. Here's a link to help you with yours Live Curly Live Free - Curly Hair Basics
Once you discover your properties, look for people with hair like yours and see what they use. It's the best place to start.
My hair prefers the more natural products from the online, boutique type companies. I use a lot of rich products; however, my hair finds the SM products really heavy, if you understand the difference.
In general, you'll find that you use a lot less of the "better" products, which tends to make them more cost effective then one might think.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08
HGs: Anything Sevi; Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; UFD Curly Magic; Botanical Spirits Jellies, CJ Repair Me