I am 52 years old and have tried many polyester strings and poly/multi hybrids in my Wilson PS95 and PS97. While I like the control these setups were giving me, I also got tennis elbow. I had to use multi for a while and sacrifice control and durability of poly. I tried Head Velocity when it came out, and really liked it. It provide soft and feel, while still giving good control. Strings are not moving much unlike typical multies. Durability is good too; it lasted 12 hour playing on clay!