It is one of the best soft polyester strings. MSV Hex plays just as soft, but probably provides better spin.Pro Line II seems to have everything I have been looking for - Comfort, Durability, Tension Maintenance, Mix of Power & Control
If you have hit with Pro Line II and have found another Poly that is better, please tell me which string you prefer and why.
I am currently playing Pro Line II 1.25 - I think it's the perfect poly
Neither are particularly crisp, and for that I prefer the Unique poly.