This is my recent experience. So, my sister-in-law sold me her old phone, and I was super excited to have it, but the SIM card slot was smaller, so after some online research, I decided to cut my SIM card to size instead of ordering a new one and having to wait for it.
When I turned on my new BlackBerry it told me it was locked. I was without a cell, not like I could glue it back to fit into my old cell. I contacted the phone's original provider and it would be a fee of $50 to unlock it and my sister-in-law would have to do it.
So I went ahead and saught another way. I ordered the code on Sunday morning through Cellunlocker.net and was thrilled to receive my unlocking code on Monday night. My new BlackBerry unlocked on the first try, and it was actually $15 cheaper than going through the original provider. I would recommend this service absolutely to anyone.
Bottom Line: Yes, I would recommend this to a friend