I'm texlax'd with Just 4 Me-regular and I do touch up's every 12 weeks, however since I plan to become a more hardcore (lol) texlaxer, and I plan to extend that to 16 weeks now. I think the normal processing time on the directions for my hair is something like 20 mins, however I leave it on for about 5 mins. then wash & nuetralize. Forget the traditional parts, I make really big parts to get through my hair faster (I learned that tip from a tutorial on the Just 4 Me website).
For me moisture has been my best friend. Particularity since at any given time you can 3 textures in your hair. The new growth (un relaxed), the tex'd hair and your old (very straight) relaxed ends. Being will moisturized makes those three textures behave better, often behave the same.
Also BIG do's have been a friend. Big do's mask the thickness of the newgrowth for example fro's, braidouts, big curls, etc.
I could not have texlaxed without bunning. Half the time I don't even see my hair because its in a bun. Frustration is waking up in the morning and not knowing what to do with your new tex'd hair. Serenity is putting it in a bun and not even have to see it. Now texing isn't bad, its a really good thing. Just saying the different textures can get you at times. Tex'ing is learning how to take care of your hair all over again because its new to you. You probably spent your life with either relaxed (straight) or natural so you'll have to learn new "what works for your" techniques.