This is an excellent polyester string. I don't play with it but I have several people that I string for that play with it and love it. It is very durable without feeling stiff as a board. I usually put it in the main strings and string the crosses with a multi-filament and it plays great.
This is one of the best polygon string. I've used this string for many years. It is inexpensive,lasts for long-time. It is an excellent string for players who break their string often. It is a little tricky to string it yourself