I've been using BG-80 for a few years now, ever since I started, really. For the first time last night, I tried the new, red version of the Zymax 67. I use the US-coded Voltric 80 4U limited edition, and I string at 22x24 pounds. Here's my initial thoughts about the Z67 compared to the BG-80. Power/Repulsion Z67: 4.5/5: easier to bend and generate power; about 90% of the time/shots produced, it provides a bit more repulsion and bite BG-80: 4.5/5: has more bounce and repulsion on soft, light shots (block shots, drop shots, etc.); provides a bit more punch on thunderous, Super Dan-like smashes Feel Z67: 4.5/5: softer; definitely feels thinner than just the 0.01 mm difference; very crisp; you can definitely feel the shuttle more as you hit it; wrist friendly and amateur friendly Bg-80: 4/5: ultra hard on impact, and you can definitely feel it with a stiff racket and higher tension; a bit dull and uncomfortable when freshly strung because of the hard feel, but it becomes very responsive as you play more Hitting Sound Z67: 4.5/5: feathery crisp, like a thin slice of bamboo when you whip it like a ninja, if that makes sense BG-80 4.5/5: metallic "ting" sound; loses the sound gradually over time; i'm guessing the Z67 does too like any other string Drop Shots Z67: 4.5/5: needs a bit more bounce sometimes BG-80: 4.5/5: a tad bouncy at times Texture, Grip, and Slice Shots Z67: 4/5: smoother texture but not slippery; less grip; slice shots have less feel, traction, and repulsion BG-80: 5/5: the rough texture is excellent for slice shots because it provides more grip, feel, traction, and repulsion Break-in Period Z67: 5/5: only requires a couple of games for it to perform like a champ BG-80: 4/5: needs more than ten games for the strings to stabilize and achieve peak performance Durability Z67: ?/5: I don't know yet. I've read some posts saying that it snaps easily/doesn't last two weeks, and I've read some saying that it's impossible to break. Hopefully, it's the latter. BG-80 4/5: a solid four out of five stars; very consistent of lasting to a couple of months even with mishits, and playing with the nylon Yonex Mavis 2000 Tension Retension Z67: 5?/5: According to Ashaway, it's the best string for tension retention. BG-80: 4.5/5: By the time it loses tension significantly, the string is about snap. Summary/Overall Value Z67: 4.5/5: There's definitely room for some improvement, but excellent overall if durability holds. It's actually made in the USA. The power is easier to tap. I also like the crisp feel. It's slightly cheaper. The red color looks good with the VT-80 limited, especially if your grip is also red. I'm happy that Ashaway actually did the research and providing somewhat of a competition for Yonex. Sadly, the majority still uses Yonex, and Ashaway's marketing and advertising in the badminton world is almost nonexistent. All I see is Yonex and Li-Ning. It's a bit disappointing, really. I wish more people would give the new Zymax series a try. More market competition for Yonex would only benefit us, the consumers. BG-80: 4.5/5: The string is also excellent, most likely Yonex's best overall string for non-professional players. Compared to Z67, BG-80 might be better suited for hard hitters with superb technique. The string is manufactured everywhere, and some are actually counterfeits. Other Thoughts: Both strings are in the same league, but different in a number of ways. It really boils down to your preference. I'm actually undecided if I will go back to BG-80 because the Z67 is a true alternative. The attributes and their scores above really depend on a lot of things. Your racket, your stringer, and your playing style just to name a few. Also, you should find your racket's stringing pattern online, print it, and tell your stringer to follow that. I know there's not much your stringer can deviate from the actual pattern, but I believe the right pattern for your specific racket adds a little more durability and performance to both your string and your racket. Not to mention, it gives you a peace of mind knowing that it's strung the right way. Other strings I've tried are the BG-65 and 66 Ultimax. BG-65 is nothing special. It's a good go-to, standard string back then. I can't imagine why anyone would still use it today. BG-80 should be the new standard even for the ones just starting out. And for BG-66 UM, the first time I've tried it, I said, "Wow!" The joy was very much short-lived because it snapped moments after my awe, and I didn't even smash or mishit. Whatever the cause may be, I feel that it shouldn't have snapped on first use. Well, never again. What I want to try next is the new Zymax 65 that just came out. Guys, if you have any experience about that string, especially the durability, please share. Thanks.