Zipbuds have been around for a few years, and their claim to fame is that their cord is integrated into a zipper. The company's 2012 models, dubbed "Fresh" and "Juiced," come in a variety of colors as well as versions that add a microphone/remote for making calls for $10 more.
The $19.99 Zipbuds Juiced reviewed here is the entry-level model, while the step-up
As with all noise-isolation style earphones, sound quality is affected by just how tight a seal you can get. The earphones come with three different-size eartips (small, medium, and large) and you'll want to pick the one that offers the snuggest fit (I went with the large).
In all, they sound OK, though I didn't find them terribly comfortable to wear when I jammed the tips into my ears in order to get a tight enough seal (if I lost the seal, they sounded very thin). In terms of sound quality, they're what you'd expect from an inexpensive set of earbuds. For some folks, that sound will be acceptable. For others, it just won't cut it, and these guys just don't outperform other earphones in this price class.
On a positive note, the zipper design really does help prevent tangles and it certainly will appeal to younger users who are after a cute, eye-catching design. To adjust how they hang, you simply unzip the cord to whatever length you desire. When you're finished using them, you zip the cord all the way up and then roll the cord up. Alas, no carrying case is included.
While the cord seems sturdy and the design has its pluses, it also has some noticeable drawbacks. For starters, it's a bit heavy, which means you probably won't want to use these earphones for running outside (they might be suitable for gym use, however).
The other problem is that since these are noise-isolating earphones that passively block out ambient noise, you will hear the cord rubbing against your clothing, with the zipper design magnifying that noise (you can hear a traditional thin cord with a cloth or rubber casing brushing up against your clothing, but the noise is muffled compared with the noise this cord produces).
Finally, when you roll these earphones up for storage, the ring they make is not so compact; they're just bulkier than other earphones. That said, they don't tangle and are very easy to unravel.
Though I didn't think the higher-end Fresh Zipbuds were a good deal at $40, I did like them better than this model. They just seem a little better built and more comfortable to wear (and yes, they sound better, though still not great). Both models are truly tangle-free but the zipper design creates other issues, including excess noise from the cord rubbing against your clothing. Some people won't mind this as much as others, and the earphones are fine for stationary use.
From a comparison standpoint, there are certainly other earphones in this price class -- and some much cheaper models, including Panasonic's $17