For most club players (2.0-3.5) I would recommend using Wilson Sensation 16 gauge(more durable) or 17 gauge(more spin). It offers a good mix of control and power. The Wilson NXT products offer more feel but doesn't last quite as long. They are easier on the arm. The Big Banger products from Luxilon are for very hard hitters. The string is tougher on the arm.
If you're not hitting 100mph serves then forget about this product. It's for 4.5 and above players.
If your strings move then good! They should! If they didn't then you might as well play with a wooden paddle. Would you want a car tire that didn't give a little? If it didn't it would be like driving on a rolling stone. Your string tension should be at mid range or lower. Those tension guides are usually listed right on your racquet. We always custom string to fit your game. Bring in your racquet about every oil change for your car. If you miss one, you still can drive it, right? It's just not good for performance.
