I bought a set of Wilson Hollow Core Pro a while back to try. Just strung my PSC 18x20 with HCP in the crosses at 56, and Alu Power Rough in the mains at 52. I will play with this setup tonight, and give first impressions, but I was looking for other people's thoughts on it too. I did a search and there are some comments but not too many. I noticed a lot of hate for the original Hollow Core but not too much either way for Pro 17. Found it almost gut-like to string too, so I'm hoping it will have some gut-like playing characteristics. It could be a cheap alternative.