The Red X series' faces are precisely milled allowing for true, rolling puts. With controlled strokes, both putters almost all but eliminate skids. Shots come off the club face comfortably and controlled under normal surface conditions. Both are attractive-looking and set up nicely at address.
Make no mistakes when reaching for a Red X putter, both are mallets and have the tendency of being a bit heavy and can take some getting used to, especially on short putts. The X3's relatively straight shaft design can also present set-up and feel problems for players not used to a mallet or straight shaft.
Red X series putters are strong-to-exceptional for those who prefer a mallet. Advanced players will especially like the X3, while the X5's offset better suits the novice putting stroke. Plunking down $300 (2009 suggested retail) should come after a few demo trips to the putting green, especially for blade users.