I chose this over the Snake Eyes Sight Line putter because the Sight Line seemed to need a double-bend shaft, and I've never had good luck with double-bend shafted putters. This putter was also much cheaper.
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First, the one negative: I was worried about this one after reading the reviews of its standard XPC version (the one "for men" due to its black-and-red color scheme) due to complaints about the face materials having noticeable seams. That concern proved well-founded. You can definitely feel the transition between the face materials -- however, they didn't seem to affect ball roll at all.
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The face is a three-part face: Milled aluminum, with a soft polymer insert, and then another milled aluminum C-grooved insert inside the polymer. What this does is provide instant feedback whether you're putting on the sweet spot or not.
However, it provides feedback without affecting performance. Putts struck off the heel or toe -- even way out on the heel or toe -- still roll true. But the middle insert provides a satisfying "click" when a ball is struck there, and that portion of the putter has grooves that help the ball get rolling more quickly.
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In testing, I could tell a big improvement in performance over both my old carbon-fiber blade putter and a Golfsmith Tg System putter. The Sapphire stayed on line better, gave me greater confidence in short putts, and was easy to lag with. It's the easiest putter to get lined up quickly I've ever owned.
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But the price point is what makes this one shine. Between the putter head, a Snake Eyes stepless steel shaft and an upgrade to a Tiger Shark oversize grip, I couldn't believe what I got for the money.
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For men worried about this being a ladies' putter, don't. The blue-and-silver color scheme fits right in with several men's club lines, including a couple of offerings from Snake Eyes.
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If Golfsmith can refine the alignment of the different inserts, this would be undoubtedly a five-star product. Even as it is, it's in the upper echelon of putters currently on the market.