It was very easy, and the color is VERY VIBRANT! I will update more colors once I do them today!
The ingredients I used was:
3 yards (9Feet) of high quality Merino Pure roving.
About 1 cup of distilled vinegar
About 1/2 tablespoon of Chartreuse iDye Natural Fabric
This was my first ever attempt at dying wool, and was more of a test than anything. I followed the basic wool dying instructions that are on this site!
First, I dumped the roving into a bowl with lukewarm water, to soak, then slowly added in warmer water to not shock it too much!
Here are some pictures of the iDye, and the actual packet, the actual powder looks DARK orange powder form, and I was worried its wasn't chartreuse, but it was!
I then got a old pot, filled it about 3/4s full with warm water, dumped in about 1/2 a tablespoon of powder dye, stirred it, then poured in the vinegar. I stirred it up again, and it turned a very emerald color! The packet states that the whole pack is enough for 3-4 pounds of fabric, and the tutorial on here stated that usually 1 table spoon is for 1 pound, but since I don't have a scale, I guesstimated that 1/2 tablespoon wouldn't be TOO much, or TOO little.
I then slowly dumped in the wet/saturated roving!
I used a chopstick to gently poke the roving around, so it wouldn't felt too much! I set my stove to about 5, which is medium! And let it heat up for about 40 minutes stirring gently every so often.
During the last 10 minutes, I got side tracked on the computer, and didn't watch the pot, and it started boiling over.
MAKE SURE TO WATCH THE ROVING. I was scared that the boiling would felt up the roving, but I caught it in time! 
After I pulled it off the stove, I let it cool for about 1 hour until the water was lukewarm. The water was almost clear!
The water wasn't completely cooled, but I was really anxious to see the color, so I slowly poured in warm water, and slowly added in cool water to wash the color out! Here is the final product!
The color is AMAZING! It much lighter than I was expecting, but literally almost EXACTLY the same color as the package! I love it! The chartreuse is very nice! IT REMINDS ME OF OSCAR FROM SESAME STREET! You know. The one that was always grumpy cos he lived in a garbage can?
Exactly what I wanted! The color is magnificent. And I still have more than 3/4s of the packet of iDye left!The only thing I would change, is to NOT use as much heat, because it did felt up a little bit. But i think it was a fine outcome for a first attempt!
Pretty sad. I need to get some!
I always felt my dreads before dying, to avoid the loose wool felting up.