PowerPro line is very good.
I've been using PowerPro the last two years and swear by it. It is almost impossible to get a backlash with it. Once I saw how well it behaved on my reel, I immediately put it on the outfit that my 13 yr old uses and he immedately stopped getting birdnests. Now we both have more fun fishing together.
I've caught a number of muskies, northern, and bass on this line and it's performance in the water is what you'd expect from a line. There is little or no stretch to the line. I had a musky slam a spinner last year and it about sprained my wrist. You can feel your lure tick the weeds as well. It is difficult to cut, but that is a good thing. It feels waxy and does not hold water like regular braided line. This is really nice in cold weather. When I was using Cortland Braided Musky line, my hand holding the rod was always wet from the water spraying off the line as it went onto the spool. With the Power Pro I don't have that issue any more.
There is a great review that may help:
http://www.tackletour.com/reviewpowerpro.html
I want to be clear that I am in no way associated with the manufacutrer of PowerPro in case this sounds too much like an endorsement.
Another Vote for Power Pro
Power Pro is the best line I have used for all types of fishing situations, especially for muskie fishing. I have used the line for a number of years now and only have good things to say. Macker, I agree with you 100% and great post with the link to tackletour.com, that has been a great site to find reviews.
I have all my muskie setups spooled with Power Pro 80lb test moss green with the diameter equivalent to 18lb test. The only down side to Power Pro is that the dye tends to come off after a while but it does not affect the line's strengh/durability in any way. The only update I have heard recently is that Power Pro was bought by Shimano but the line is still made in the USA.
Chas Martin
Musky Mastery Guide Service
www.muskymastery.com