About four months ago, I switched my strings to Luxilon Big Banger Timo, 17 gauge; and have some observations that may be worth sharing.
Wear: As advertised, these strings just do not wear out! I had my racquets restrung now, only because I know they should be. After playing with them for about eight weeks, they had loosened up enough; so the balls were â€˜flyingâ€™ too much.
Tension and control: The theory on these strings is that they provide great feel; but not as much power (when strung at 58 lbs or so). So first time back on the court last night with a newly strung racquet, I felt like I could hit my forehand as hard as I wanted and it stays in (a great feeling). They also appear to put more spin on the ball; so shots that look like they are going long, can actually drop inside the baseline.
Vibration: Because the strings are so â€˜hardâ€™, the caution is that the vibration can cause arm problems. But in four months of very regular use, I have felt absolutely nothing.
So I am a convert.