CNC Head porting for $850?

[JeanDSM]

I was surfing the net and found this site that offers a CNC porting services for 4g63 heads,

http://www.portworks.net/product.php?productid=5&cat=136&page=1

It dosent specify much on their stages and all that.
I wanted to know if someone had any experience with these people becuase im in the middle of building my 6 bolt long block and if ill ever port my head it will be with a CNC machine but this is the cheapest i found

 

[gsx4g64]

I have first hand experience with this company and their work. I have say that I am more than happy. The wait time is within reason, and the quality is the best. I have a full race setup and the head just completes my project. They made sure that the head was exactly what I asked for and did not over charge me.
I would recommend them to anyone that is looking to do serious race or simple street setup. You will not be disappointed.