Holds tension as well as natural gut. Only problem: depending on the frane it can feel mighty stiff.
I'm having a PSGT strung with Wilson Gut / 4G 125 @ 49/45 to see now that works.
If really seekng a soft co-poly then I agree, MsV Co-Focus is perfect. Nothing more comfortable. Only downside is lower control and lots of power, at least for a poly.
Only on Talk Tennis can you find people who believe
that 10 feet of lead tape has no effect on a frame...