Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: We will be using this primarily for pecans.  Any comments on cracking the pecan with this cracker?
Document: We had ordered a nut cracker (not from Amazon) that broke on the first nut. We had ordered it because one of the reviews said that it worked on black walnuts...WRONG.... so we found this on Amazon and we went from using a vice to this and the leverage works well and easily. Black walnuts have a much harder shell than most other nuts.
The Get Crackin nut cracker is an invaluable tool for cracking black walnuts. What I learned with this tool is that you can get large pieces of nut meats if you crack the nuts from top to bottom rather than side to side. Once the initial crack is made you can manipulate the nut and recrack it (top to bottom) to make an easy job of getting the quarter nut pieces out of the shell without smashing them. Pretty slick! (hope this makes sense)
great for english walnuts, pecans and hazel nuts. not so good for black walnuts. bought it for black walnuts so a little disappointed.
Bought this for black walnuts. Required a great deal of force making it impractical for shelling 100's of black walnuts. I found a Utube video of a guy using a VICE to crack the walnuts--nearly effortless and cranking slowly preserves large pieces of nut meat. I wish I'd seen that video before making this purchase.
I have been using a vise to crack black walnut for a couple years now. Recently saw this and mentioned to a friend who happen to just get this from Amazon. She loaned it to me to try out and I absolutely love it. The nut cracked cleaner with this compare to the one cracked with a vise. No more small fragments of the hard shell sticking into the nut like I had when using the vise. Just order myself one.
The nutcracker is exactly as is described. It cracks black walnuts just fine. The only thing needing improvement would be the handle. cracking for a while will leave your hand sore from the flat metal. I added a softer handle over the metal one and it works like a charm.Very good product.
I got this because vendors at my farmer's market starting showing up with macadamia nuts in the shell. They're so delicious right out of the shell, but I don't want to smoosh my fingers trying to bang them in between rocks to crack them. This works pretty well, though sometimes the nuts slide around before cracking. Macadamia nuts need at least 2 presses per nut to get it, so it's time consuming. It's pretty heavy duty, so I don't foresee it breaking any time soon.
This nut cracker is very heavy duty and will do the job. The best part is the shells of the nuts don't shoot across the room.
Impressed by the efficiency of the nut cracker. Macadamia nuts have an extremely hard shell, and this nut cracker does the job!
we love this nut cracker. It is by far the best one we have ever bought. It handles our hickory nuts very easily.we would recommend it for anyone.
Answer: That is what I use mine for.  I am quite happy with it.  Faster and neater than a hammer.  Made of heavy cast iron so it holds up very well.  I figure on having and using mine for many years.